#!/usr/bin/env perl
# mysqltuner.pl - Version 1.5.0
# High Performance MySQL Tuning Script
# Copyright (C) 2006-2015 Major Hayden - major@mhtx.net
#
# For the latest updates, please visit http://mysqltuner.com/
# Git repository available at http://github.com/major/MySQLTuner-perl
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This project would not be possible without help from:
#   Matthew Montgomery     Paul Kehrer          Dave Burgess
#   Jonathan Hinds         Mike Jackson         Nils Breunese
#   Shawn Ashlee           Luuk Vosslamber      Ville Skytta
#   Trent Hornibrook       Jason Gill           Mark Imbriaco
#   Greg Eden              Aubin Galinotti      Giovanni Bechis
#   Bill Bradford          Ryan Novosielski     Michael Scheidell
#   Blair Christensen      Hans du Plooy        Victor Trac
#   Everett Barnes         Tom Krouper          Gary Barrueto
#   Simon Greenaway        Adam Stein           Isart Montane
#   Baptiste M.            Cole Turner          Major Hayden
#	Joe Ashcraft           Jean-Marie Renouard
#
# Inspired by Matthew Montgomery's tuning-primer.sh script:
# http://forge.mysql.com/projects/view.php?id=44
#
use strict;
use warnings;
use diagnostics;
use File::Spec;
use Getopt::Long;
use File::Basename;
use Cwd 'abs_path';
use Data::Dumper qw/Dumper/;
#use JSON;
# Set up a few variables for use in the script
my $tunerversion = "1.5.0";
my (@adjvars, @generalrec);

# Set defaults
my %opt = (
		"nobad" 		=> 0,
		"nogood" 		=> 0,
		"noinfo" 		=> 0,
		"debug" 		=> 0,
		"nocolor" 		=> 0,
		"forcemem" 		=> 0,
		"forceswap" 	=> 0,
		"host" 			=> 0,
		"socket" 		=> 0,
		"port" 			=> 0,
		"user" 			=> 0,
		"pass"			=> 0,
		"skipsize" 		=> 0,
		"checkversion" 	=> 0,
		"buffers" 		=> 0,
		"passwordfile"	=> 0,
		"reportfile"	=> 0,
		"dbstat"		=> 0,
		"idxstat"		=> 0,
		"skippassword"	=> 0,
	);


# Gather the options from the command line
GetOptions(\%opt,
		'nobad',
		'nogood',
		'noinfo',
		'debug',
		'nocolor',
		'forcemem=i',
		'forceswap=i',
		'host=s',
		'socket=s',
		'port=i',
		'user=s',
		'pass=s',
		'skipsize',
		'checkversion',
		'mysqladmin=s',
		'mysqlcmd=s',
		'help',
		'buffers',
		'skippassword',
		'passwordfile=s',
		'reportfile=s',
		'silent',
		'dbstat',
		'idxstat',
	);

if (defined $opt{'help'} && $opt{'help'} == 1) { usage(); }

sub usage {
	# Shown with --help option passed
	print "   MySQLTuner $tunerversion - MySQL High Performance Tuning Script\n".
		"   Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
		"   Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL\n".
		"\n".
		"   Important Usage Guidelines:\n".
		"      To run the script with the default options, run the script without arguments\n".
		"      Allow MySQL server to run for at least 24-48 hours before trusting suggestions\n".
		"      Some routines may require root level privileges (script will provide warnings)\n".
		"      You must provide the remote server's total memory when connecting to other servers\n".
		"\n".
		"   Connection and Authentication\n".
		"      --host <hostname>    Connect to a remote host to perform tests (default: localhost)\n".
		"      --socket <socket>    Use a different socket for a local connection\n".
		"      --port <port>        Port to use for connection (default: 3306)\n".
		"      --user <username>    Username to use for authentication\n".
		"      --pass <password>    Password to use for authentication\n".
		"      --mysqladmin <path>  Path to a custom mysqladmin executable\n".
		"      --mysqlcmd <path>    Path to a custom mysql executable\n".
		"\n".
		"   Performance and Reporting Options\n".
		"      --skipsize           Don't enumerate tables and their types/sizes (default: on)\n".
		"                           (Recommended for servers with many tables)\n".
		"      --skippassword       Don't perform checks on user passwords(default: off)\n".
		"      --checkversion       Check for updates to MySQLTuner (default: don't check)\n".
		"      --forcemem <size>    Amount of RAM installed in megabytes\n".
		"      --forceswap <size>   Amount of swap memory configured in megabytes\n".
		"      --passwordfile <path>Path to a password file list(one password by line)\n".
		"      --reportfile <path>  Path to a report txt file\n".
		"\n".
		"   Output Options:\n".
		"      --nogood             Remove OK responses\n".
		"      --nobad              Remove negative/suggestion responses\n".
		"      --noinfo             Remove informational responses\n".
		"      --debug              Print debug information\n".
		"      --dbstat             Print database information\n".
		"      --idxstat            Print index information\n".
		"      --nocolor            Don't print output in color\n".
		"      --buffers            Print global and per-thread buffer values\n";
	exit;
}

my $devnull = File::Spec->devnull();
my $basic_password_files=($opt{passwordfile} eq "0")? abs_path(dirname(__FILE__))."/basic_passwords.txt" : abs_path($opt{passwordfile}) ;

# for RPM distributions
$basic_password_files="/usr/share/mysqltuner/basic_passwords.txt" unless -f "$basic_password_files";

# 
my $reportfile=undef;
$reportfile=abs_path($opt{reportfile}) unless $opt{reportfile} eq "0";

my $fh=undef;
open($fh, '>', $reportfile) or die("Fail opening $reportfile") if defined($reportfile);
$opt{nocolor} = 1 if defined($reportfile);

# Setting up the colors for the print styles
my $good = ($opt{nocolor} == 0)? "[\e[0;32mOK\e[0m]" : "[OK]" ;
my $bad  = ($opt{nocolor} == 0)? "[\e[0;31m!!\e[0m]" : "[!!]" ;
my $info = ($opt{nocolor} == 0)? "[\e[0;34m--\e[0m]" : "[--]" ;
my $deb  = ($opt{nocolor} == 0)? "[\e[0;31mDG\e[0m]" : "[DG]" ;

# Super sturucture containing all informations
my %result;

# Functions that handle the print styles
sub prettyprint {
	print $_[0];
	print $fh $_[0] if defined($fh);
}
sub goodprint  { prettyprint $good." ".$_[0] unless ($opt{nogood} == 1); }
sub infoprint  { prettyprint $info." ".$_[0] unless ($opt{noinfo} == 1); }
sub badprint   { prettyprint $bad. " ".$_[0] unless ($opt{nobad}  == 1); }
sub debugprint { prettyprint $deb. " ".$_[0] unless ($opt{debug}  == 0); }
sub redwrap    { return ($opt{nocolor} == 0) ? "\e[0;31m".$_[0]."\e[0m" : $_[0] ; }
sub greenwrap  { return ($opt{nocolor} == 0) ? "\e[0;32m".$_[0]."\e[0m" : $_[0] ; }

# Calculates the parameter passed in bytes, and then rounds it to one decimal place
sub hr_bytes {
	my $num = shift;
	if ($num >= (1024**3)) { #GB
		return sprintf("%.1f",($num/(1024**3)))."G";
	} elsif ($num >= (1024**2)) { #MB
		return sprintf("%.1f",($num/(1024**2)))."M";
	} elsif ($num >= 1024) { #KB
		return sprintf("%.1f",($num/1024))."K";
	} else {
		return $num."B";
	}
}

# Calculates the parameter passed in bytes, and then rounds it to the nearest integer
sub hr_bytes_rnd {
	my $num = shift;
	if ($num >= (1024**3)) { #GB
		return int(($num/(1024**3)))."G";
	} elsif ($num >= (1024**2)) { #MB
		return int(($num/(1024**2)))."M";
	} elsif ($num >= 1024) { #KB
		return int(($num/1024))."K";
	} else {
		return $num."B";
	}
}

# Calculates the parameter passed to the nearest power of 1000, then rounds it to the nearest integer
sub hr_num {
	my $num = shift;
	if ($num >= (1000**3)) { # Billions
		return int(($num/(1000**3)))."B";
	} elsif ($num >= (1000**2)) { # Millions
		return int(($num/(1000**2)))."M";
	} elsif ($num >= 1000) { # Thousands
		return int(($num/1000))."K";
	} else {
		return $num;
	}
}

# Calculate Percentage
sub percentage{
	my $value=shift;
	my $total=shift;
	$total=0 unless defined $total;
	return 100,00 if $total == 0;
	return sprintf("%.2f", ($value*100/$total) );
}

# Calculates uptime to display in a more attractive form
sub pretty_uptime {
	my $uptime = shift;
	my $seconds = $uptime % 60;
	my $minutes = int(($uptime % 3600) / 60);
	my $hours = int(($uptime % 86400) / (3600));
	my $days = int($uptime / (86400));
	my $uptimestring;
	if ($days > 0) {
		$uptimestring = "${days}d ${hours}h ${minutes}m ${seconds}s";
	} elsif ($hours > 0) {
		$uptimestring = "${hours}h ${minutes}m ${seconds}s";
	} elsif ($minutes > 0) {
		$uptimestring = "${minutes}m ${seconds}s";
	} else {
		$uptimestring = "${seconds}s";
	}
	return $uptimestring;
}

# Retrieves the memory installed on this machine
my ($physical_memory,$swap_memory,$duflags);
sub os_setup {
	sub memerror {
		badprint "Unable to determine total memory/swap; use '--forcemem' and '--forceswap'\n";
		exit;
	}
	my $os = `uname`;
	$duflags = ($os =~ /Linux/) ? '-b' : '';
	if ($opt{'forcemem'} > 0) {
		$physical_memory = $opt{'forcemem'} * 1048576;
		infoprint "Assuming $opt{'forcemem'} MB of physical memory\n";
		if ($opt{'forceswap'} > 0) {
			$swap_memory = $opt{'forceswap'} * 1048576;
			infoprint "Assuming $opt{'forceswap'} MB of swap space\n";
		} else {
			$swap_memory = 0;
			badprint "Assuming 0 MB of swap space (use --forceswap to specify)\n";
		}
	} else {
		if ($os =~ /Linux/) {
			$physical_memory = `LANG=en free -b | grep Mem | awk '{print \$2}'` or memerror;
			$swap_memory = `LANG=en free -b | grep Swap | awk '{print \$2}'` or memerror;
		} elsif ($os =~ /Darwin/) {
			$physical_memory = `sysctl -n hw.memsize` or memerror;
			$swap_memory = `sysctl -n vm.swapusage | awk '{print \$3}' | sed 's/\..*\$//'` or memerror;
		} elsif ($os =~ /NetBSD|OpenBSD|FreeBSD/) {
			$physical_memory = `sysctl -n hw.physmem` or memerror;
			if ($physical_memory < 0) {
				$physical_memory = `sysctl -n hw.physmem64` or memerror;
			}
			$swap_memory = `swapctl -l | grep '^/' | awk '{ s+= \$2 } END { print s }'` or memerror;
		} elsif ($os =~ /BSD/) {
			$physical_memory = `sysctl -n hw.realmem` or memerror;
			$swap_memory = `swapinfo | grep '^/' | awk '{ s+= \$2 } END { print s }'`;
		} elsif ($os =~ /SunOS/) {
			$physical_memory = `/usr/sbin/prtconf | grep Memory | cut -f 3 -d ' '` or memerror;
			chomp($physical_memory);
			$physical_memory = $physical_memory*1024*1024;
		} elsif ($os =~ /AIX/) {
			$physical_memory = `lsattr -El sys0 | grep realmem | awk '{print \$2}'` or memerror;
			chomp($physical_memory);
			$physical_memory = $physical_memory*1024;
			$swap_memory = `lsps -as | awk -F"(MB| +)" '/MB /{print \$2}'` or memerror;
			chomp($swap_memory);
			$swap_memory = $swap_memory*1024*1024;
		}
	}
	chomp($physical_memory);
	chomp($swap_memory);
	chomp($os);
	$result{'OS'}{'OS Type'}=$os;
	$result{'OS'}{'Physical Memory'}{'bytes'}=$physical_memory;
	$result{'OS'}{'Physical Memory'}{'pretty'}=hr_bytes($physical_memory);
	$result{'OS'}{'Swap Memory'}{'bytes'}=$swap_memory;
	$result{'OS'}{'Swap Memory'}{'pretty'}=hr_bytes($swap_memory);

}

# Checks to see if a MySQL login is possible
my ($mysqllogin,$doremote,$remotestring,$mysqlcmd,$mysqladmincmd);
sub mysql_setup {
	$doremote = 0;
	$remotestring = '';
	if ($opt{mysqladmin}) {
		$mysqladmincmd = $opt{mysqladmin};
	} else {
		$mysqladmincmd = `which mysqladmin`;
	}
	chomp($mysqladmincmd);
	if (! -e $mysqladmincmd && $opt{mysqladmin}) {
		badprint "Unable to find the mysqladmin command you specified: ".$mysqladmincmd."\n";
		exit;
	} elsif (! -e $mysqladmincmd) {
		badprint "Couldn't find mysqladmin in your \$PATH. Is MySQL installed?\n";
		exit;
	}
	if ($opt{mysqlcmd}) {
		$mysqlcmd = $opt{mysqlcmd};
	} else {
		$mysqlcmd = `which mysql`;
	}
	chomp($mysqlcmd);
	if (! -e $mysqlcmd && $opt{mysqlcmd}) {
		badprint "Unable to find the mysql command you specified: ".$mysqlcmd."\n";
		exit;
	} elsif (! -e $mysqlcmd) {
		badprint "Couldn't find mysql in your \$PATH. Is MySQL installed?\n";
		exit;
	}

	# Are we being asked to connect via a socket?
	if ($opt{socket} ne 0) {
		$remotestring = " -S $opt{socket}";
	}
	# Are we being asked to connect to a remote server?
	if ($opt{host} ne 0) {
		chomp($opt{host});
		$opt{port} = ($opt{port} eq 0)? 3306 : $opt{port} ;
		# If we're doing a remote connection, but forcemem wasn't specified, we need to exit
		if ($opt{'forcemem'} eq 0) {
			badprint "The --forcemem option is required for remote connections\n";
			exit;
		}
		infoprint "Performing tests on $opt{host}:$opt{port}\n";
		$remotestring = " -h $opt{host} -P $opt{port}";
		$doremote = 1;
	}
	# Did we already get a username and password passed on the command line?
	if ($opt{user} ne 0 and $opt{pass} ne 0) {
		$mysqllogin = "-u $opt{user} -p'$opt{pass}'".$remotestring;
		my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`;
		if ($loginstatus =~ /mysqld is alive/) {
			goodprint "Logged in using credentials passed on the command line\n";
			return 1;
		} else {
			badprint "Attempted to use login credentials, but they were invalid\n";
			exit 0;
		}
	}
	my $svcprop = `which svcprop 2>/dev/null`;
	if (substr($svcprop, 0, 1) =~ "/") {
		# We are on solaris
		(my $mysql_login = `svcprop -p quickbackup/username svc:/network/mysql-quickbackup:default`) =~ s/\s+$//;
		(my $mysql_pass = `svcprop -p quickbackup/password svc:/network/mysql-quickbackup:default`) =~ s/\s+$//;
		if ( substr($mysql_login, 0, 7) ne "svcprop" ) {
			# mysql-quickbackup is installed
			$mysqllogin = "-u $mysql_login -p$mysql_pass";
			my $loginstatus = `mysqladmin $mysqllogin ping 2>&1`;
			if ($loginstatus =~ /mysqld is alive/) {
				goodprint "Logged in using credentials from mysql-quickbackup.\n";
				return 1;
			} else {
				badprint "Attempted to use login credentials from mysql-quickbackup, but they failed.\n";
				exit 0;
			}
		}
	} elsif ( -r "/etc/psa/.psa.shadow" and $doremote == 0 ) {
		# It's a Plesk box, use the available credentials
		$mysqllogin = "-u admin -p`cat /etc/psa/.psa.shadow`";
		my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`;
		unless ($loginstatus =~ /mysqld is alive/) {
			badprint "Attempted to use login credentials from Plesk, but they failed.\n";
			exit 0;
		}
	} elsif ( -r "/usr/local/directadmin/conf/mysql.conf" and $doremote == 0 ){
		# It's a DirectAdmin box, use the available credentials
		my $mysqluser=`cat /usr/local/directadmin/conf/mysql.conf | egrep '^user=.*'`;
		my $mysqlpass=`cat /usr/local/directadmin/conf/mysql.conf | egrep '^passwd=.*'`;

		$mysqluser =~ s/user=//;
		$mysqluser =~ s/[\r\n]//;
		$mysqlpass =~ s/passwd=//;
		$mysqlpass =~ s/[\r\n]//;
		
		$mysqllogin = "-u $mysqluser -p$mysqlpass";
		
		my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
		unless ($loginstatus =~ /mysqld is alive/) {
			badprint "Attempted to use login credentials from DirectAdmin, but they failed.\n";
			exit 0;
		}
	} elsif ( -r "/etc/mysql/debian.cnf" and $doremote == 0 ){
		# We have a debian maintenance account, use it
		$mysqllogin = "--defaults-file=/etc/mysql/debian.cnf";
		my $loginstatus = `$mysqladmincmd $mysqllogin ping 2>&1`;
		if ($loginstatus =~ /mysqld is alive/) {
			goodprint "Logged in using credentials from debian maintenance account.\n";
			return 1;
		} else {
			badprint "Attempted to use login credentials from debian maintenance account, but they failed.\n";
			exit 0;
		}
	} else {
		# It's not Plesk or debian, we should try a login
		debugprint "$mysqladmincmd $remotestring ping 2>&1";
		my $loginstatus = `$mysqladmincmd $remotestring ping 2>&1`;
		if ($loginstatus =~ /mysqld is alive/) {
			# Login went just fine
			$mysqllogin = " $remotestring ";
			# Did this go well because of a .my.cnf file or is there no password set?
			my $userpath = `printenv HOME`;
			if (length($userpath) > 0) {
				chomp($userpath);
			}
			unless ( -e "${userpath}/.my.cnf" or -e "${userpath}/.mylogin.cnf" ) {
				badprint "Successfully authenticated with no password - SECURITY RISK!\n";
			}
			return 1;
		} else {
			print STDERR "Please enter your MySQL administrative login: ";
			my $name = <>;
			print STDERR "Please enter your MySQL administrative password: ";
			system("stty -echo >$devnull 2>&1");
			my $password = <>;
			system("stty echo >$devnull 2>&1");
			chomp($password);
			chomp($name);
			$mysqllogin = "-u $name";
			if (length($password) > 0) {
				$mysqllogin .= " -p'$password'";
			}
			$mysqllogin .= $remotestring;
			my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`;
			if ($loginstatus =~ /mysqld is alive/) {
				print STDERR "\n";
				if (! length($password)) {
					# Did this go well because of a .my.cnf file or is there no password set?
					my $userpath = `ls -d ~`;
					chomp($userpath);
					unless ( -e "$userpath/.my.cnf" ) {
						badprint "Successfully authenticated with no password - SECURITY RISK!\n";
					}
				}
				return 1;
			} else {
				print "\n".$bad." Attempted to use login credentials, but they were invalid.\n";
				exit 0;
			}
			exit 0;
		}
	}
}

# MySQL Request Array
sub select_array {
	my $req=shift;
	debugprint "PERFORM: $req \n";
	my @result=`$mysqlcmd $mysqllogin -Bse "$req"`;
	chomp (@result);
	return @result;
}

# MySQL Request one
sub select_one {
	my $req=shift;
	debugprint "PERFORM: $req \n";
	my $result=`$mysqlcmd $mysqllogin -Bse "$req"`;
	chomp ($result);
	return $result;
}

sub get_tuning_info {
	my @infoconn = select_array "\\s";
	my ($tkey, $tval);
	@infoconn = grep {!/Threads:/ and !/Connection id:/ and !/pager:/ and !/Using/ } @infoconn;
	foreach my $line (@infoconn) {
		if ($line =~ /\s*(.*):\s*(.*)/) {
			debugprint "$1 => $2\n";
			$tkey=$1;
			$tval=$2;
			chomp($tkey);
			chomp($tval);
			$result{'MySQL Client'}{$tkey} = $tval;
		}
	}
	$result{'MySQL Client'}{'Client Path'}=$mysqlcmd;
	$result{'MySQL Client'}{'Admin Path'}=$mysqladmincmd;
	$result{'MySQL Client'}{'Authentication Info'}=$mysqllogin;

}
# Populates all of the variable and status hashes
my (%mystat,%myvar,$dummyselect,%myrepl, %myslaves);
sub get_all_vars {
	# We need to initiate at least one query so that our data is useable
	$dummyselect = select_one "SELECT VERSION()";
	debugprint "VERSION: ".$dummyselect."\n";
	$result{'MySQL Client'}{'Version'}=$dummyselect;
	my @mysqlvarlist = select_array "SHOW /*!50000 GLOBAL */ VARIABLES";
	foreach my $line (@mysqlvarlist) {
		$line =~ /([a-zA-Z_]*)\s*(.*)/;
		$myvar{$1} = $2;
		$result{'Variables'}{$1}=$2;
		debugprint "V: $1 = $2\n";
	}
	
	my @mysqlstatlist = select_array "SHOW /*!50000 GLOBAL */ STATUS";
	foreach my $line (@mysqlstatlist) {
		$line =~ /([a-zA-Z_]*)\s*(.*)/;
		$mystat{$1} = $2;
		$result{'Status'}{$1}=$2;
		debugprint "S: $1 = $2\n";
	}
	# Workaround for MySQL bug #59393 wrt. ignore-builtin-innodb
	if (($myvar{'ignore_builtin_innodb'} || "") eq "ON") {
		$myvar{'have_innodb'} = "NO";
	}
	# have_* for engines is deprecated and will be removed in MySQL 5.6;
	# check SHOW ENGINES and set corresponding old style variables.
	# Also works around MySQL bug #59393 wrt. skip-innodb
	my @mysqlenginelist = select_array "SHOW ENGINES";
	foreach my $line (@mysqlenginelist) {
		if ($line =~ /^([a-zA-Z_]+)\s+(\S+)/) {
			my $engine = lc($1);

			if ($engine eq "federated" || $engine eq "blackhole") {
				$engine .= "_engine";
			} elsif ($engine eq "berkeleydb") {
				$engine = "bdb";
			}
			my $val = ($2 eq "DEFAULT") ? "YES" : $2;
			$myvar{"have_$engine"} = $val;
			$result{'Storage Engines'}{$engine}=$2;
		}
	}

	my @mysqlslave = select_array "SHOW SLAVE STATUS\\G";
	
	foreach my $line (@mysqlslave) {
		if ($line =~ /\s*(.*):\s*(.*)/) {
			debugprint "$1 => $2\n";
			$myrepl{"$1"} = $2;
			$result{'Replication'}{'Status'}{$1}=$2;
		}
	}
	#print Dumper(%myrepl);
	#exit 0;
	my @mysqlslaves = select_array "SHOW SLAVE HOSTS";
	my @lineitems=();
	foreach my $line (@mysqlslaves) {
		debugprint "L: $line \n";
		@lineitems=split /\s+/, $line;
		$myslaves{$lineitems[0]}=$line;
		$result{'Replication'}{'Slaves'}{$lineitems[0]}=$lineitems[4];
	}
}

sub get_basic_passwords {
	my $file=shift;
	open (FH, "< $file") or die "Can't open $file for read: $!";
	my @lines = <FH>;
	close FH or die "Cannot close $file: $!";
	return @lines 
}

sub security_recommendations {
	prettyprint "\n-------- Security Recommendations  -------------------------------------------\n";
	if ($opt{skippassword} eq 1) {
		infoprint "Skipped due to --skippassword option\n";
		return;
	}
	# Looking for Anonymous users
	my @mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE TRIM(USER) = '' OR USER IS NULL";
	if (@mysqlstatlist) {
		foreach my $line (sort @mysqlstatlist) {
			chomp($line);
			badprint "User '".$line."' is an anonymous account.\n";
		}
		push(@generalrec, "Remove Anonymous User account - there is ".scalar(@mysqlstatlist). " Anonymous account.");
	} else {
		goodprint "There is no anonymous account in all database users\n";
	} 

	# Looking for Empty Password
	@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE password = '' OR password IS NULL";
	if (@mysqlstatlist) {
		foreach my $line (sort @mysqlstatlist) {
			chomp($line);
			badprint "User '".$line."' has no password set.\n";
		}
		push(@generalrec, "Set up a Password for user with the following SQL statement ( SET PASSWORD FOR 'user'\@'SpecificDNSorIp' = PASSWORD('secure_password'); )");
	} else {
		goodprint "All database users have passwords assigned\n";
	} 

	# Looking for User with user/ uppercase /capitalise user as password
	@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE CAST(password as Binary) = PASSWORD(user) OR CAST(password as Binary) = PASSWORD(UPPER(user)) OR CAST(password as Binary) = PASSWORD(UPPER(LEFT(User, 1)) + SUBSTRING(User, 2, LENGTH(User)))";
	if (@mysqlstatlist) {
		foreach my $line (sort @mysqlstatlist) {
			chomp($line);
			badprint "User '".$line."' has user name as password.\n";
		}
		push(@generalrec, "Set up a Secure Password for user\@host ( SET PASSWORD FOR 'user'\@'SpecificDNSorIp' = PASSWORD('secure_password'); )");
	}

	@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE HOST='%'";
	if (@mysqlstatlist) {
		foreach my $line (sort @mysqlstatlist) {
			chomp($line);
			badprint "User '".$line."' hasn't specific host restriction.\n";
		}
		push(@generalrec, "Restrict Host for user\@% to user\@SpecificDNSorIp");
	}

	unless (-f $basic_password_files) {
		badprint "There is not basic password file list !\n";
		return;
	}
	
	my @passwords=get_basic_passwords $basic_password_files;
	infoprint "There is ". scalar(@passwords). " basic passwords in the list.\n";
	my $nbins=0;
	my $passreq;
	if (@passwords) {
		foreach my $pass (@passwords) {
			$pass=~s/\s//g;
			chomp($pass);
			# Looking for User with user/ uppercase /capitalise weak password
			@mysqlstatlist = select_array "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE password = PASSWORD('".$pass."') OR password = PASSWORD(UPPER('".$pass."')) OR password = PASSWORD(UPPER(LEFT('".$pass."', 1)) + SUBSTRING('".$pass."', 2, LENGTH('".$pass."')))";
			debugprint "There is ".scalar (@mysqlstatlist). " items.\n";
			if (@mysqlstatlist) {
				foreach my $line (@mysqlstatlist) {
					chomp($line);
					badprint "User '".$line."' is using weak pasword: $pass in a lower, upper or capitalize derivated version.\n";
					$nbins++;
				}
			}
		}
	}
	if ($nbins>0) {
		push(@generalrec, $nbins. " user(s) used basic or weaked password.");
	}
}

sub get_replication_status { 
	prettyprint "\n-------- Replication Metrics -------------------------------------------------\n";

	if( scalar(keys %myslaves)==0 ) {
		infoprint "No replication slave(s) for this server.\n";
	} else {
		infoprint "This server is acting as master for ".scalar(keys %myslaves)." server(s).\n";
	}

	if( scalar(keys %myrepl)==0 and scalar(keys %myslaves)==0 ) {
		infoprint "This is a standalone server..\n";
		return;
	}
	if( scalar(keys %myrepl)==0 ) {
		infoprint "No replication setup for this server.\n";
	} 
	my ($io_running) = $myrepl{'Slave_IO_Running'};
	debugprint "IO RUNNING: $io_running \n";
	my ($sql_running) = $myrepl{'Slave_SQL_Running'};
	debugprint "SQL RUNNING: $sql_running \n";
	my ($seconds_behind_master) = $myrepl{'Seconds_Behind_Master'};
	debugprint "SECONDS : $seconds_behind_master \n";
	
	if (defined($io_running) and ($io_running !~ '/yes/i' or $sql_running !~ '/yes/i' )) {
		badprint "This replication slave is not running but seems to be configurated.";
	} 
	if (defined($io_running ) && $io_running =~ '/yes/i' && $sql_running =~ '/yes/i') {
		if ($myvar{'read_only'} eq 'OFF') {
			badprint "This replication slave is running with the read_only option disabled.";
		} else {
			goodprint "This replication slave is running with the read_only option enabled.";
		}
		if ($seconds_behind_master>0) {
				badprint "This replication slave is lagging and slave has $seconds_behind_master second(s) behind master host.";
		} else {
			goodprint "This replication slave is uptodate with master.";
		}
	}
}

# Checks for supported or EOL'ed MySQL versions
my ($mysqlvermajor,$mysqlverminor, $mysqlvermicro);
sub validate_mysql_version {
	($mysqlvermajor,$mysqlverminor,$mysqlvermicro) = $myvar{'version'} =~ /^(\d+)(?:\.(\d+)|)(?:\.(\d+)|)/;
	$mysqlverminor ||= 0;
	$mysqlvermicro ||= 0;
	if (!mysql_version_ge(5, 1)) {
		badprint "Your MySQL version ".$myvar{'version'}." is EOL software!  Upgrade soon!\n";
	} elsif (mysql_version_ge(6)) {
		badprint "Currently running unsupported MySQL version ".$myvar{'version'}."\n";
	} else {
		goodprint "Currently running supported MySQL version ".$myvar{'version'}."\n";
	}
}

# Checks if MySQL version is greater than equal to (major, minor, micro)
sub mysql_version_ge {
	my ($maj, $min, $mic) = @_;
	$min ||= 0;
	$mic ||= 0;
	return $mysqlvermajor > $maj || $mysqlvermajor == $maj && ($mysqlverminor > $min || $mysqlverminor == $min && $mysqlvermicro >= $mic);
}

# Checks for 32-bit boxes with more than 2GB of RAM
my ($arch);
sub check_architecture {
	if ($doremote eq 1) { return; }
	if (`uname` =~ /SunOS/ && `isainfo -b` =~ /64/) {
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} elsif (`uname` !~ /SunOS/ && `uname -m` =~ /64/) {
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} elsif (`uname` =~ /AIX/ && `bootinfo -K` =~ /64/) {
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} elsif (`uname` =~ /NetBSD|OpenBSD/ && `sysctl -b hw.machine` =~ /64/) {
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} elsif (`uname` =~ /FreeBSD/ && `sysctl -b hw.machine_arch` =~ /64/) {
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} elsif (`uname` =~ /Darwin/ && `uname -m` =~ /Power Macintosh/) {
		# Darwin box.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu1228.15.4~1/RELEASE_PPC Power Macintosh
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} elsif (`uname` =~ /Darwin/ && `uname -m` =~ /x86_64/) {
		# Darwin gibas.local 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan  6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64
		$arch = 64;
		goodprint "Operating on 64-bit architecture\n";
	} else {
		$arch = 32;
		if ($physical_memory > 2147483648) {
			badprint "Switch to 64-bit OS - MySQL cannot currently use all of your RAM\n";
		} else {
			goodprint "Operating on 32-bit architecture with less than 2GB RAM\n";
		}
	}
	$result{'OS'}{'Architecture'}="$arch bits";
}

# Start up a ton of storage engine counts/statistics
my (%enginestats,%enginecount,$fragtables);
sub check_storage_engines {
	if ($opt{skipsize} eq 1) {
		prettyprint "\n-------- Storage Engine Statistics -------------------------------------------\n";
		infoprint "Skipped due to --skipsize option\n";
		return;
	}
	prettyprint "\n-------- Storage Engine Statistics -------------------------------------------\n";
	
	my $engines;
	if (mysql_version_ge(5, 1, 5)) {
		my @engineresults = select_array "SELECT ENGINE,SUPPORT FROM information_schema.ENGINES WHERE ENGINE NOT IN ('performance_schema','MyISAM','MERGE','MEMORY') ORDER BY ENGINE ASC";
		foreach my $line (@engineresults) {
			my ($engine,$engineenabled);
			($engine,$engineenabled) = $line =~ /([a-zA-Z_]*)\s+([a-zA-Z]+)/;
			$engines .= ($engineenabled eq "YES" || $engineenabled eq "DEFAULT") ? greenwrap "+".$engine." " : redwrap "-".$engine." ";
		}
	} else {
		$engines .= (defined $myvar{'have_archive'} && $myvar{'have_archive'} eq "YES")? greenwrap "+Archive " : redwrap "-Archive " ;
		$engines .= (defined $myvar{'have_bdb'} && $myvar{'have_bdb'} eq "YES")? greenwrap "+BDB " : redwrap "-BDB " ;
		$engines .= (defined $myvar{'have_federated_engine'} && $myvar{'have_federated_engine'} eq "YES")? greenwrap "+Federated " : redwrap "-Federated " ;
		$engines .= (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES")? greenwrap "+InnoDB " : redwrap "-InnoDB " ;
		$engines .= (defined $myvar{'have_isam'} && $myvar{'have_isam'} eq "YES")? greenwrap "+ISAM " : redwrap "-ISAM " ;
		$engines .= (defined $myvar{'have_ndbcluster'} && $myvar{'have_ndbcluster'} eq "YES")? greenwrap "+NDBCluster " : redwrap "-NDBCluster " ;
	}
	infoprint "Status: $engines\n";
	if (mysql_version_ge(5, 1, 5)) {
		# MySQL 5 servers can have table sizes calculated quickly from information schema
		my @templist = select_array "SELECT ENGINE,SUM(DATA_LENGTH+INDEX_LENGTH),COUNT(ENGINE) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema', 'performance_schema', 'mysql') AND ENGINE IS NOT NULL GROUP BY ENGINE ORDER BY ENGINE ASC;";

		foreach my $line (@templist) {
			my ($engine,$size,$count);
			($engine,$size,$count) = $line =~ /([a-zA-Z_]*)\s+(\d+)\s+(\d+)/;
			if (!defined($size)) { next; }
			$enginestats{$engine} = $size;
			$enginecount{$engine} = $count;
		}
		$fragtables = select_one "SELECT COUNT(TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema','performance_schema', 'mysql') AND Data_free > 0 AND NOT ENGINE='MEMORY'";
		chomp($fragtables);
	} else {
		# MySQL < 5 servers take a lot of work to get table sizes
		my @tblist;
		# Now we build a database list, and loop through it to get storage engine stats for tables
		my @dblist = select_array "SHOW DATABASES";
		foreach my $db (@dblist) {
			chomp($db);
			if ($db eq "information_schema" or $db eq "performance_schema" or $db eq "mysql") { next; }
			my @ixs = (1, 6, 9);
			if (!mysql_version_ge(4, 1)) {
				# MySQL 3.23/4.0 keeps Data_Length in the 5th (0-based) column
				@ixs = (1, 5, 8);
			}
			push(@tblist, map { [ (split)[@ixs] ] } select_array "SHOW TABLE STATUS FROM \\\`$db\\\`");
		}
		# Parse through the table list to generate storage engine counts/statistics
		$fragtables = 0;
		foreach my $tbl (@tblist) {
			my ($engine, $size, $datafree) = @$tbl;
			if (defined $enginestats{$engine}) {
				$enginestats{$engine} += $size;
				$enginecount{$engine} += 1;
			} else {
				$enginestats{$engine} = $size;
				$enginecount{$engine} = 1;
			}
			if ($datafree > 0) {
				$fragtables++;
			}
		}
	}
	while (my ($engine,$size) = each(%enginestats)) {
		infoprint "Data in $engine tables: ".hr_bytes_rnd($size)." (Tables: ".$enginecount{$engine}.")"."\n";
	}
	# If the storage engine isn't being used, recommend it to be disabled
	if (!defined $enginestats{'InnoDB'} && defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES") {
		badprint "InnoDB is enabled but isn't being used\n";
		push(@generalrec,"Add skip-innodb to MySQL configuration to disable InnoDB");
	}
	if (!defined $enginestats{'BerkeleyDB'} && defined $myvar{'have_bdb'} && $myvar{'have_bdb'} eq "YES") {
		badprint "BDB is enabled but isn't being used\n";
		push(@generalrec,"Add skip-bdb to MySQL configuration to disable BDB");
	}
	if (!defined $enginestats{'ISAM'} && defined $myvar{'have_isam'} && $myvar{'have_isam'} eq "YES") {
		badprint "MYISAM is enabled but isn't being used\n";
		push(@generalrec,"Add skip-isam to MySQL configuration to disable ISAM (MySQL > 4.1.0)");
	}
	# Fragmented tables
	if ($fragtables > 0) {
		badprint "Total fragmented tables: $fragtables\n";
		push(@generalrec,"Run OPTIMIZE TABLE to defragment tables for better performance");
	} else {
		goodprint "Total fragmented tables: $fragtables\n";
	}

	
	# Auto increments
	my %tblist;
	# Find the maximum integer
	my $maxint = select_one "SELECT ~0";
	
	# Now we build a database list, and loop through it to get storage engine stats for tables
	my @dblist = select_array "SHOW DATABASES";
	foreach my $db (@dblist) {
		chomp($db);
		
		if(!$tblist{$db})
		{
			$tblist{$db} = ();
		}
		
		if ($db eq "information_schema") { next; }
		my @ia = (0, 10);
		if (!mysql_version_ge(4, 1)) {
			# MySQL 3.23/4.0 keeps Data_Length in the 5th (0-based) column
			@ia = (0, 9);
		}
		push(@{$tblist{$db}}, map { [ (split)[@ia] ] } select_array "SHOW TABLE STATUS FROM \\\`$db\\\`");
	}
	
	my @dbnames = keys %tblist;
	
	foreach my $db (@dbnames) {
		foreach my $tbl (@{$tblist{$db}}) {
			my ($name, $autoincrement) = @$tbl;
			
			if ($autoincrement =~ /^\d+?$/) {
				my $percent = ($autoincrement / $maxint) * 100;
				if($percent >= 75) {
					badprint "Table '$db.$name' has an autoincrement value near max capacity ($percent%)\n";
				}
			}
		}
	}

}

my %mycalc;
sub calculations {
	if ($mystat{'Questions'} < 1) {
		badprint "Your server has not answered any queries - cannot continue...";
		exit 0;
	}
	# Per-thread memory
	if (mysql_version_ge(4)) {
		$mycalc{'per_thread_buffers'} = $myvar{'read_buffer_size'} + $myvar{'read_rnd_buffer_size'} + $myvar{'sort_buffer_size'} + $myvar{'thread_stack'} + $myvar{'join_buffer_size'};
	} else {
		$mycalc{'per_thread_buffers'} = $myvar{'record_buffer'} + $myvar{'record_rnd_buffer'} + $myvar{'sort_buffer'} + $myvar{'thread_stack'} + $myvar{'join_buffer_size'};
	}
	$mycalc{'total_per_thread_buffers'} = $mycalc{'per_thread_buffers'} * $myvar{'max_connections'};
	$mycalc{'max_total_per_thread_buffers'} = $mycalc{'per_thread_buffers'} * $mystat{'Max_used_connections'};

	# Server-wide memory
	$mycalc{'max_tmp_table_size'} = ($myvar{'tmp_table_size'} > $myvar{'max_heap_table_size'}) ? $myvar{'max_heap_table_size'} : $myvar{'tmp_table_size'} ;
	$mycalc{'server_buffers'} = $myvar{'key_buffer_size'} + $mycalc{'max_tmp_table_size'};
	$mycalc{'server_buffers'} += (defined $myvar{'innodb_buffer_pool_size'}) ? $myvar{'innodb_buffer_pool_size'} : 0 ;
	$mycalc{'server_buffers'} += (defined $myvar{'innodb_additional_mem_pool_size'}) ? $myvar{'innodb_additional_mem_pool_size'} : 0 ;
	$mycalc{'server_buffers'} += (defined $myvar{'innodb_log_buffer_size'}) ? $myvar{'innodb_log_buffer_size'} : 0 ;
	$mycalc{'server_buffers'} += (defined $myvar{'query_cache_size'}) ? $myvar{'query_cache_size'} : 0 ;

	# Global memory
	# Max used memory is memory used by MySQL based on Max_used_connections
	# This is the max memory used theorically calculated with the max concurrent connection number reached by mysql
	$mycalc{'max_used_memory'} = $mycalc{'server_buffers'} + $mycalc{"max_total_per_thread_buffers"};

	# Total possible memory is memory needed by MySQL based on max_connections
	# This is the max memory MySQL can theorically used if all connections allowed has opened by mysql
	$mycalc{'total_possible_used_memory'} = $mycalc{'server_buffers'} + $mycalc{'total_per_thread_buffers'};

	$mycalc{'pct_physical_memory'} = int(($mycalc{'total_possible_used_memory'} * 100) / $physical_memory);

	# Maximum memory limit
	$mycalc{'max_peak_memory'}=0;
	foreach my $key ( 'key_buffer_size', 'query_cache_size', 'tmp_table_size', 
		'innodb_buffer_pool_size', 'innodb_additional_mem_pool_size',
		'innodb_log_buffer_size') {
		$mycalc{'max_peak_memory'}+=$myvar{$key} if defined $myvar{$key};
	}
	foreach my $key ( 'sort_buffer_size', 'read_buffer_size', 'read_rnd_buffer_size', 'join_buffer_size',
		'thread_stack', 'binlog_cache_size' ) {
		$mycalc{'max_peak_memory'}+=($myvar{$key}*$myvar{'max_connections'}) if defined $myvar{$key};
	}
	debugprint "Max Peak Memory: ".hr_bytes($mycalc{'max_peak_memory'})."\n";
	$mycalc{'pct_max_physical_memory'} = percentage($mycalc{'max_peak_memory'}, $physical_memory);
	debugprint "Max Percentage RAM: ".$mycalc{'pct_max_physical_memory'}."%\n";

	# Slow queries
	$mycalc{'pct_slow_queries'} = int(($mystat{'Slow_queries'}/$mystat{'Questions'}) * 100);

	# Connections
	$mycalc{'pct_connections_used'} = int(($mystat{'Max_used_connections'}/$myvar{'max_connections'}) * 100);
	$mycalc{'pct_connections_used'} = ($mycalc{'pct_connections_used'} > 100) ? 100 : $mycalc{'pct_connections_used'} ;

	# Aborted Connections
	$mycalc{'pct_connections_aborted'} = percentage($mystat{'Aborted_connects'}, $mystat{'Connections'});
	debugprint "Aborted_connects: ".$mystat{'Aborted_connects'}."\n";
	debugprint "Connections: ".$mystat{'Connections'}."\n";
	debugprint "pct_connections_aborted: ".$mycalc{'pct_connections_aborted'}."\n";
	
	# Key buffers
	if (mysql_version_ge(4, 1) && $myvar{'key_buffer_size'} > 0) {
		$mycalc{'pct_key_buffer_used'} = sprintf("%.1f",(1 - (($mystat{'Key_blocks_unused'} * $myvar{'key_cache_block_size'}) / $myvar{'key_buffer_size'})) * 100);
	} else {
		$mycalc{'pct_key_buffer_used'} = 0;
	}
	
	if ($mystat{'Key_read_requests'} > 0) {
		$mycalc{'pct_keys_from_mem'} = sprintf("%.1f",(100 - (($mystat{'Key_reads'} / $mystat{'Key_read_requests'}) * 100)));
	} else {
		$mycalc{'pct_keys_from_mem'} = 0;
	}

	if ($mystat{'Key_write_requests'} > 0) {
		$mycalc{'pct_wkeys_from_mem'} = sprintf("%.1f",(100 - (($mystat{'Key_writes'} / $mystat{'Key_write_requests'}) * 100)));
	} else {
		$mycalc{'pct_wkeys_from_mem'} = 0;
	}

	if ($doremote eq 0 and !mysql_version_ge(5)) {
		my $size = 0;
		$size += (split)[0] for `find $myvar{'datadir'} -name "*.MYI" 2>&1 | xargs du -L $duflags 2>&1`;
		$mycalc{'total_myisam_indexes'} = $size;
	} elsif (mysql_version_ge(5)) {
		$mycalc{'total_myisam_indexes'} = select_one "SELECT IFNULL(SUM(INDEX_LENGTH),0) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema') AND ENGINE = 'MyISAM';";
	}
	if (defined $mycalc{'total_myisam_indexes'} and $mycalc{'total_myisam_indexes'} == 0) {
		$mycalc{'total_myisam_indexes'} = "fail";
	} elsif (defined $mycalc{'total_myisam_indexes'}) {
		chomp($mycalc{'total_myisam_indexes'});
	}

	# Query cache
	if (mysql_version_ge(4)) {
		$mycalc{'query_cache_efficiency'} = sprintf("%.1f",($mystat{'Qcache_hits'} / ($mystat{'Com_select'} + $mystat{'Qcache_hits'})) * 100);
		if ($myvar{'query_cache_size'}) {
			$mycalc{'pct_query_cache_used'} = sprintf("%.1f",100 - ($mystat{'Qcache_free_memory'} / $myvar{'query_cache_size'}) * 100);
		}
	if ($mystat{'Qcache_lowmem_prunes'} == 0) {
			$mycalc{'query_cache_prunes_per_day'} = 0;
		} else {
			$mycalc{'query_cache_prunes_per_day'} = int($mystat{'Qcache_lowmem_prunes'} / ($mystat{'Uptime'}/86400));
		}
	}

	# Sorting
	$mycalc{'total_sorts'} = $mystat{'Sort_scan'} + $mystat{'Sort_range'};
	if ($mycalc{'total_sorts'} > 0) {
		$mycalc{'pct_temp_sort_table'} = int(($mystat{'Sort_merge_passes'} / $mycalc{'total_sorts'}) * 100);
	}

	# Joins
	$mycalc{'joins_without_indexes'} = $mystat{'Select_range_check'} + $mystat{'Select_full_join'};
	$mycalc{'joins_without_indexes_per_day'} = int($mycalc{'joins_without_indexes'} / ($mystat{'Uptime'}/86400));

	# Temporary tables
	if ($mystat{'Created_tmp_tables'} > 0) {
		if ($mystat{'Created_tmp_disk_tables'} > 0) {
			$mycalc{'pct_temp_disk'} = int(($mystat{'Created_tmp_disk_tables'} / $mystat{'Created_tmp_tables'}) * 100);
		} else {
			$mycalc{'pct_temp_disk'} = 0;
		}
	}

	# Table cache
	if ($mystat{'Opened_tables'} > 0) {
		$mycalc{'table_cache_hit_rate'} = int($mystat{'Open_tables'}*100/$mystat{'Opened_tables'});
	} else {
		$mycalc{'table_cache_hit_rate'} = 100;
	}

	# Open files
	if ($myvar{'open_files_limit'} > 0) {
		$mycalc{'pct_files_open'} = int($mystat{'Open_files'}*100/$myvar{'open_files_limit'});
	}

	# Table locks
	if ($mystat{'Table_locks_immediate'} > 0) {
		if ($mystat{'Table_locks_waited'} == 0) {
			$mycalc{'pct_table_locks_immediate'} = 100;
		} else {
			$mycalc{'pct_table_locks_immediate'} = int($mystat{'Table_locks_immediate'}*100/($mystat{'Table_locks_waited'} + $mystat{'Table_locks_immediate'}));
		}
	}

	# Thread cache
	$mycalc{'thread_cache_hit_rate'} = int(100 - (($mystat{'Threads_created'} / $mystat{'Connections'}) * 100));

	# Other
	if ($mystat{'Connections'} > 0) {
		$mycalc{'pct_aborted_connections'} = int(($mystat{'Aborted_connects'}/$mystat{'Connections'}) * 100);
	}
	if ($mystat{'Questions'} > 0) {
		$mycalc{'total_reads'} = $mystat{'Com_select'};
		$mycalc{'total_writes'} = $mystat{'Com_delete'} + $mystat{'Com_insert'} + $mystat{'Com_update'} + $mystat{'Com_replace'};
		if ($mycalc{'total_reads'} == 0) {
			$mycalc{'pct_reads'} = 0;
			$mycalc{'pct_writes'} = 100;
		} else {
			$mycalc{'pct_reads'} = int(($mycalc{'total_reads'}/($mycalc{'total_reads'}+$mycalc{'total_writes'})) * 100);
			$mycalc{'pct_writes'} = 100-$mycalc{'pct_reads'};
		}
	}

	# InnoDB
	if ($myvar{'have_innodb'} eq "YES") {
		$mycalc{'innodb_log_size_pct'} = ($myvar{'innodb_log_file_size'} * 100 / $myvar{'innodb_buffer_pool_size'});
	}
	($mystat{'Innodb_buffer_pool_read_requests'}, $mystat{'Innodb_buffer_pool_reads'})=(1,1) unless defined $mystat{'Innodb_buffer_pool_reads'};
	$mycalc{'pct_read_efficiency'}=percentage(($mystat{'Innodb_buffer_pool_read_requests'}-$mystat{'Innodb_buffer_pool_reads'}), $mystat{'Innodb_buffer_pool_read_requests'}) if defined $mystat{'Innodb_buffer_pool_read_requests'};
	debugprint "pct_read_efficiency: ".$mycalc{'pct_read_efficiency'}."\n";
	debugprint "Innodb_buffer_pool_reads: ".$mystat{'Innodb_buffer_pool_reads'}."\n";
	debugprint "Innodb_buffer_pool_read_requests: ".$mystat{'Innodb_buffer_pool_read_requests'}."\n";
	($mystat{'Innodb_buffer_pool_write_requests'}, $mystat{'Innodb_buffer_pool_writes'})=(1,1) unless defined $mystat{'Innodb_buffer_pool_writes'}; 
	$mycalc{'pct_write_efficiency'}=percentage(($mystat{'Innodb_buffer_pool_write_requests'}-$mystat{'Innodb_buffer_pool_writes'}), $mystat{'Innodb_buffer_pool_write_requests'}) if defined $mystat{'Innodb_buffer_pool_write_requests'};
	debugprint "pct_write_efficiency: ".$mycalc{'pct_read_efficiency'}."\n";
	debugprint "Innodb_buffer_pool_writes: ".$mystat{'Innodb_buffer_pool_writes'}."\n";
	debugprint "Innodb_buffer_pool_write_requests: ".$mystat{'Innodb_buffer_pool_write_requests'}."\n";
	$mycalc{'pct_innodb_buffer_used'}=percentage(($mystat{'Innodb_buffer_pool_pages_total'}-$mystat{'Innodb_buffer_pool_pages_free'}), $mystat{'Innodb_buffer_pool_pages_total'}) if defined $mystat{'Innodb_buffer_pool_pages_total'};
	
	# Binlog Cache
	if ($myvar{'log_bin'} ne 'OFF') {
		$mycalc{'pct_binlog_cache'} = percentage( $mystat{'Binlog_cache_use'} - $mystat{'Binlog_cache_disk_use'}, $mystat{'Binlog_cache_use'} );
	}
}

sub mysql_stats {
	prettyprint "\n-------- Performance Metrics -------------------------------------------------\n";
	# Show uptime, queries per second, connections, traffic stats
	my $qps;
	if ($mystat{'Uptime'} > 0) { $qps = sprintf("%.3f",$mystat{'Questions'}/$mystat{'Uptime'}); }
	if ($mystat{'Uptime'} < 86400) { push(@generalrec,"MySQL started within last 24 hours - recommendations may be inaccurate"); }
	infoprint "Up for: ".pretty_uptime($mystat{'Uptime'})." (".hr_num($mystat{'Questions'}).
		" q [".hr_num($qps)." qps], ".hr_num($mystat{'Connections'})." conn,".
		" TX: ".hr_num($mystat{'Bytes_sent'}).", RX: ".hr_num($mystat{'Bytes_received'}).")\n";
	infoprint "Reads / Writes: ".$mycalc{'pct_reads'}."% / ".$mycalc{'pct_writes'}."%\n";
	# Binlog Cache
	if ($myvar{'log_bin'} eq 'OFF') {
		infoprint "Binary logging is disabled\n";
	} else {
		infoprint "Binary logging is enabled (GTID MODE: ".(defined ($myvar{'gtid_mode'})?$myvar{'gtid_mode'}:"OFF").")\n";
	}

	# Memory usage
	infoprint "Total buffers: ".hr_bytes($mycalc{'server_buffers'})." global + ".hr_bytes($mycalc{'per_thread_buffers'})." per thread ($myvar{'max_connections'} max threads)\n";

	if ($opt{buffers} ne 0) {
		infoprint "Global Buffers\n";
		infoprint " +-- Key Buffer: " . hr_bytes($myvar{'key_buffer_size'}) . "\n";
		infoprint " +-- Max Tmp Table: ".hr_bytes($mycalc{'max_tmp_table_size'})."\n";

		if (defined $myvar{'query_cache_type'}) {
			infoprint "Query Cache Buffers\n";
			infoprint " +-- Query Cache: ".$myvar{'query_cache_type'}." - " .($myvar{'query_cache_type'} eq 0| $myvar{'query_cache_type'} eq 'OFF'?"DISABLED":($myvar{'query_cache_type'} eq 1?"ALL REQUESTS":"ON DEMAND")) . "\n";
			infoprint " +-- Query Cache Size: " . hr_bytes($myvar{'query_cache_size'}) . "\n";
		}

		infoprint "Per Thread Buffers\n";
		infoprint " +-- Read Buffer: " . hr_bytes($myvar{'read_buffer_size'}) . "\n";
		infoprint " +-- Read RND Buffer: " . hr_bytes($myvar{'read_rnd_buffer_size'}) . "\n";
		infoprint " +-- Sort Buffer: " . hr_bytes($myvar{'sort_buffer_size'}) . "\n";
		infoprint " +-- Thread stack: " . hr_bytes($myvar{'thread_stack'}) . "\n";
		infoprint " +-- Join Buffer: " . hr_bytes($myvar{'join_buffer_size'}) . "\n";
		if ( $myvar{'log_bin'} ne 'OFF') {
			infoprint "Binlog Cache Buffers\n";
			infoprint " +-- Binlog Cache: ". hr_bytes($myvar{'binlog_cache_size'})."\n";
		}
	}

	if ($arch && $arch == 32 && $mycalc{'total_possible_used_memory'} > 2*1024*1024*1024) {
		badprint "Allocating > 2GB RAM on 32-bit systems can cause system instability\n";
		badprint "Maximum reached memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
	} elsif ($mycalc{'pct_physical_memory'} > 85) {
		badprint "Maximum reached memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
	} else {
		goodprint "Maximum reached memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
	}

	if ($mycalc{'pct_max_physical_memory'} > 85) {
		badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'max_peak_memory'})." ($mycalc{'pct_max_physical_memory'}% of installed RAM)\n";
		push(@generalrec,"Reduce your overall MySQL memory footprint for system stability");
	} else {
		goodprint "Maximum possible memory usage: ".hr_bytes($mycalc{'max_peak_memory'})." ($mycalc{'pct_max_physical_memory'}% of installed RAM)\n";
	}

	# Slow queries
	if ($mycalc{'pct_slow_queries'} > 5) {
		badprint "Slow queries: $mycalc{'pct_slow_queries'}% (".hr_num($mystat{'Slow_queries'})."/".hr_num($mystat{'Questions'}).")\n";
	} else {
		goodprint "Slow queries: $mycalc{'pct_slow_queries'}% (".hr_num($mystat{'Slow_queries'})."/".hr_num($mystat{'Questions'}).")\n";
	}
	if ($myvar{'long_query_time'} > 10) { push(@adjvars,"long_query_time (<= 10)"); }
	if (defined($myvar{'log_slow_queries'})) {
		if ($myvar{'log_slow_queries'} eq "OFF") { push(@generalrec,"Enable the slow query log to troubleshoot bad queries"); }
	}

	# Connections
	if ($mycalc{'pct_connections_used'} > 85) {
		badprint "Highest connection usage: $mycalc{'pct_connections_used'}%  ($mystat{'Max_used_connections'}/$myvar{'max_connections'})\n";
		push(@adjvars,"max_connections (> ".$myvar{'max_connections'}.")");
		push(@adjvars,"wait_timeout (< ".$myvar{'wait_timeout'}.")","interactive_timeout (< ".$myvar{'interactive_timeout'}.")");
		push(@generalrec,"Reduce or eliminate persistent connections to reduce connection usage")
	} else {
		goodprint "Highest usage of available connections: $mycalc{'pct_connections_used'}% ($mystat{'Max_used_connections'}/$myvar{'max_connections'})\n";
	}

	# Aborted Connections
	if ($mycalc{'pct_connections_aborted'} > 3) {
		badprint "Aborted connections: $mycalc{'pct_connections_aborted'}%  ($mystat{'Aborted_connects'}/$mystat{'Connections'})\n";
		push(@generalrec,"Reduce or eliminate unclosed connections and network issues")
	} else {
		goodprint "Aborted connections: $mycalc{'pct_connections_aborted'}%  ($mystat{'Aborted_connects'}/$mystat{'Connections'})\n";
	}

	# Key buffer usage
	if (defined($mycalc{'pct_key_buffer_used'})) {
		if ($mycalc{'pct_key_buffer_used'} < 90) {
			badprint "Key buffer used: $mycalc{'pct_key_buffer_used'}% (".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100)." used / ".hr_num($myvar{'key_buffer_size'})." cache)\n";
			#push(@adjvars,"key_buffer_size (\~ ".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100).")");
		} else {
			goodprint "Key buffer used: $mycalc{'pct_key_buffer_used'}% (".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100)." used / ".hr_num($myvar{'key_buffer_size'})." cache)\n";
		}	
	} else {
			# No queries have run that would use keys
			debugprint "Key buffer used: $mycalc{'pct_key_buffer_used'}% (".hr_num( $myvar{'key_buffer_size'} * $mycalc{'pct_key_buffer_used'} / 100)." used / ".hr_num($myvar{'key_buffer_size'})." cache)\n";
	}
	# Key buffer
	if (!defined($mycalc{'total_myisam_indexes'}) and $doremote == 1) {
		push(@generalrec,"Unable to calculate MyISAM indexes on remote MySQL server < 5.0.0");
	} elsif ($mycalc{'total_myisam_indexes'} =~ /^fail$/) {
		badprint "Cannot calculate MyISAM index size - re-run script as root user\n";
	} elsif ($mycalc{'total_myisam_indexes'} == "0") {
		badprint "None of your MyISAM tables are indexed - add indexes immediately\n";
	} else {
		if ($myvar{'key_buffer_size'} < $mycalc{'total_myisam_indexes'} && $mycalc{'pct_keys_from_mem'} < 95) {
			badprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
			push(@adjvars,"key_buffer_size (> ".hr_bytes($mycalc{'total_myisam_indexes'}).")");
		} else {
			goodprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
		}
		if ($mystat{'Key_read_requests'} > 0) {
			if ($mycalc{'pct_keys_from_mem'} < 95) {
				badprint "Read Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
			} else {
				goodprint "Read Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
			}
		} else {
			# No queries have run that would use keys
			debugprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
		}
		if ($mystat{'Key_write_requests'} > 0) {
			if ($mycalc{'pct_wkeys_from_mem'} < 95) {
				badprint "Write Key buffer hit rate: $mycalc{'pct_wkeys_from_mem'}% (".hr_num($mystat{'Key_write_requests'})." cached / ".hr_num($mystat{'Key_writes'})." writes)\n";
			} else {
				goodprint "Write Key buffer hit rate: $mycalc{'pct_wkeys_from_mem'}% (".hr_num($mystat{'Key_write_requests'})." cached / ".hr_num($mystat{'Key_writes'})." writes)\n";
			}
		} else {
			# No queries have run that would use keys
			debugprint "Write Key buffer hit rate: $mycalc{'pct_wkeys_from_mem'}% (".hr_num($mystat{'Key_write_requests'})." cached / ".hr_num($mystat{'Key_writes'})." writes)\n";
		}
	}

	# Query cache
	if (!mysql_version_ge(4)) {
		# MySQL versions < 4.01 don't support query caching
		push(@generalrec,"Upgrade MySQL to version 4+ to utilize query caching");
	} elsif ($myvar{'query_cache_size'} < 1) {
		badprint "Query cache is disabled\n";
		push(@adjvars,"query_cache_size (>= 8M)");
	} elsif ($myvar{'query_cache_type'} eq "OFF") {
				badprint "Query cache is disabled\n";
				push(@adjvars,"query_cache_type (=1)");
	} elsif ($mystat{'Com_select'} == 0) {
		badprint "Query cache cannot be analyzed - no SELECT statements executed\n";
	} else {
		if ($mycalc{'query_cache_efficiency'} < 20) {
			badprint "Query cache efficiency: $mycalc{'query_cache_efficiency'}% (".hr_num($mystat{'Qcache_hits'})." cached / ".hr_num($mystat{'Qcache_hits'}+$mystat{'Com_select'})." selects)\n";
			push(@adjvars,"query_cache_limit (> ".hr_bytes_rnd($myvar{'query_cache_limit'}).", or use smaller result sets)");
		} else {
			goodprint "Query cache efficiency: $mycalc{'query_cache_efficiency'}% (".hr_num($mystat{'Qcache_hits'})." cached / ".hr_num($mystat{'Qcache_hits'}+$mystat{'Com_select'})." selects)\n";
		}
		if ($mycalc{'query_cache_prunes_per_day'} > 98) {
			badprint "Query cache prunes per day: $mycalc{'query_cache_prunes_per_day'}\n";
			if ($myvar{'query_cache_size'} >= 128*1024*1024) {
				push(@generalrec,"Increasing the query_cache size over 128M may reduce performance");
				push(@adjvars,"query_cache_size (> ".hr_bytes_rnd($myvar{'query_cache_size'}).") [see warning above]");
			} else {
				push(@adjvars,"query_cache_size (> ".hr_bytes_rnd($myvar{'query_cache_size'}).")");
			}
		} else {
			goodprint "Query cache prunes per day: $mycalc{'query_cache_prunes_per_day'}\n";
		}
	}

	# Sorting
	if ($mycalc{'total_sorts'} == 0) {
		# For the sake of space, we will be quiet here
		# No sorts have run yet
	} elsif ($mycalc{'pct_temp_sort_table'} > 10) {
		badprint "Sorts requiring temporary tables: $mycalc{'pct_temp_sort_table'}% (".hr_num($mystat{'Sort_merge_passes'})." temp sorts / ".hr_num($mycalc{'total_sorts'})." sorts)\n";
		push(@adjvars,"sort_buffer_size (> ".hr_bytes_rnd($myvar{'sort_buffer_size'}).")");
		push(@adjvars,"read_rnd_buffer_size (> ".hr_bytes_rnd($myvar{'read_rnd_buffer_size'}).")");
	} else {
		goodprint "Sorts requiring temporary tables: $mycalc{'pct_temp_sort_table'}% (".hr_num($mystat{'Sort_merge_passes'})." temp sorts / ".hr_num($mycalc{'total_sorts'})." sorts)\n";
	}

	# Joins
	if ($mycalc{'joins_without_indexes_per_day'} > 250) {
		badprint "Joins performed without indexes: $mycalc{'joins_without_indexes'}\n";
		push(@adjvars,"join_buffer_size (> ".hr_bytes($myvar{'join_buffer_size'}).", or always use indexes with joins)");
		push(@generalrec,"Adjust your join queries to always utilize indexes");
	} else {
		# For the sake of space, we will be quiet here
		# No joins have run without indexes
	}

	# Temporary tables
	if ($mystat{'Created_tmp_tables'} > 0) {
		if ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} < 256*1024*1024) {
			badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_tables'})." total)\n";
			push(@adjvars,"tmp_table_size (> ".hr_bytes_rnd($myvar{'tmp_table_size'}).")");
			push(@adjvars,"max_heap_table_size (> ".hr_bytes_rnd($myvar{'max_heap_table_size'}).")");
			push(@generalrec,"When making adjustments, make tmp_table_size/max_heap_table_size equal");
			push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
		} elsif ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} >= 256*1024*1024) {
			badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_tables'})." total)\n";
			push(@generalrec,"Temporary table size is already large - reduce result set size");
			push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
		} else {
			goodprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_tables'})." total)\n";
		}
	} else {
		# For the sake of space, we will be quiet here
		# No temporary tables have been created
	}

	# Thread cache
	if ($myvar{'thread_cache_size'} eq 0) {
		badprint "Thread cache is disabled\n";
		push(@generalrec,"Set thread_cache_size to 4 as a starting value");
		push(@adjvars,"thread_cache_size (start at 4)");
	} else {
		if ($mycalc{'thread_cache_hit_rate'} <= 50) {
			badprint "Thread cache hit rate: $mycalc{'thread_cache_hit_rate'}% (".hr_num($mystat{'Threads_created'})." created / ".hr_num($mystat{'Connections'})." connections)\n";
			push(@adjvars,"thread_cache_size (> $myvar{'thread_cache_size'})");
		} else {
			goodprint "Thread cache hit rate: $mycalc{'thread_cache_hit_rate'}% (".hr_num($mystat{'Threads_created'})." created / ".hr_num($mystat{'Connections'})." connections)\n";
		}
	}

	# Table cache
	my $table_cache_var = "";
	if ($mystat{'Open_tables'} > 0) {
		if ($mycalc{'table_cache_hit_rate'} < 20) {
			badprint "Table cache hit rate: $mycalc{'table_cache_hit_rate'}% (".hr_num($mystat{'Open_tables'})." open / ".hr_num($mystat{'Opened_tables'})." opened)\n";
			if (mysql_version_ge(5, 1)) {
				$table_cache_var = "table_open_cache";
			} else {
				$table_cache_var = "table_cache";
			}
			push(@adjvars,$table_cache_var." (> ".$myvar{$table_cache_var}.")");
			push(@generalrec,"Increase ".$table_cache_var." gradually to avoid file descriptor limits");
			push(@generalrec,"Read this before increasing ".$table_cache_var." over 64: http://bit.ly/1mi7c4C");
		} else {
			goodprint "Table cache hit rate: $mycalc{'table_cache_hit_rate'}% (".hr_num($mystat{'Open_tables'})." open / ".hr_num($mystat{'Opened_tables'})." opened)\n";
		}
	}

	# Open files
	if (defined $mycalc{'pct_files_open'}) {
		if ($mycalc{'pct_files_open'} > 85) {
			badprint "Open file limit used: $mycalc{'pct_files_open'}% (".hr_num($mystat{'Open_files'})."/".hr_num($myvar{'open_files_limit'}).")\n";
			push(@adjvars,"open_files_limit (> ".$myvar{'open_files_limit'}.")");
		} else {
			goodprint "Open file limit used: $mycalc{'pct_files_open'}% (".hr_num($mystat{'Open_files'})."/".hr_num($myvar{'open_files_limit'}).")\n";
		}
	}

	# Table locks
	if (defined $mycalc{'pct_table_locks_immediate'}) {
		if ($mycalc{'pct_table_locks_immediate'} < 95) {
			badprint "Table locks acquired immediately: $mycalc{'pct_table_locks_immediate'}%\n";
			push(@generalrec,"Optimize queries and/or use InnoDB to reduce lock wait");
		} else {
			goodprint "Table locks acquired immediately: $mycalc{'pct_table_locks_immediate'}% (".hr_num($mystat{'Table_locks_immediate'})." immediate / ".hr_num($mystat{'Table_locks_waited'}+$mystat{'Table_locks_immediate'})." locks)\n";
		}
	}

	# Binlog cache
	if (defined $mycalc{'pct_binlog_cache'}) {
		if ($mycalc{'pct_binlog_cache'} < 90 && $mystat{'Binlog_cache_use'}>0 ) {
			badprint "Binlog cache memory access: ".$mycalc{'pct_binlog_cache'}."% ( ".($mystat{'Binlog_cache_use'}-$mystat{'Binlog_cache_disk_use'})." Memory / ".$mystat{'Binlog_cache_use'}." Total)\n";
			push(@generalrec,"Increase binlog_cache_size (Actual value: ".$myvar{'binlog_cache_size'}.") ");
			push(@adjvars,"binlog_cache_size (".hr_bytes($myvar{'binlog_cache_size'}+16*1024*1024)." ) ");
		} else {
			goodprint "Binlog cache memory access: ". $mycalc{'pct_binlog_cache'}."% ( ".($mystat{'Binlog_cache_use'}-$mystat{'Binlog_cache_disk_use'})." Memory / ".$mystat{'Binlog_cache_use'}." Total)\n";
			debugprint "Not enought data to validate binlog cache size\n" if $mystat{'Binlog_cache_use'}<10; 
		}
	}

	# Performance options
	if (!mysql_version_ge(5, 1)) {
		push(@generalrec,"Upgrade to MySQL 5.5+ to use asynchrone write");
	} elsif ($myvar{'concurrent_insert'} eq "OFF") {
		push(@generalrec,"Enable concurrent_insert by setting it to 'ON'");
	} elsif ($myvar{'concurrent_insert'} eq 0) {
		push(@generalrec,"Enable concurrent_insert by setting it to 1");
	}
	if ($mycalc{'pct_aborted_connections'} > 5) {
		badprint "Connections aborted: ".$mycalc{'pct_aborted_connections'}."%\n";
		push(@generalrec,"Your applications are not closing MySQL connections properly");
	}

}
# Recommandations for Innodb
sub mysql_innodb {
	prettyprint "\n-------- InnoDB Metrics -----------------------------------------------------\n";
	# InnoDB
	unless (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES" && defined $enginestats{'InnoDB'}) {
		infoprint "InnoDB is disabled.";
		if (mysql_version_ge(5,5)) {
			badprint "InnoDB Storage engine is disabled. InnoDB is the default storage engine\n";
		}
		return;
	}
	infoprint "InnoDB is enabled.\n";

	if ($opt{buffers} ne 0) {
		infoprint "InnoDB Buffers\n";
		if (defined $myvar{'innodb_buffer_pool_size'}) {
			infoprint " +-- InnoDB Buffer Pool: " . hr_bytes($myvar{'innodb_buffer_pool_size'}) . "\n";
		}
		if (defined $myvar{'innodb_buffer_pool_instances'}) {
			infoprint " +-- InnoDB Buffer Pool Instances: " . $myvar{'innodb_buffer_pool_instances'} . "\n";
		}
		if (defined $myvar{'innodb_additional_mem_pool_size'}) {
			infoprint " +-- InnoDB Additional Mem Pool: " . hr_bytes($myvar{'innodb_additional_mem_pool_size'}) . "\n";
		}
		if (defined $myvar{'innodb_log_buffer_size'}) {
			infoprint " +-- InnoDB Log Buffer: " . hr_bytes($myvar{'innodb_log_buffer_size'}) . "\n";
		}
		if (defined $mystat{'Innodb_buffer_pool_pages_free'}) {
			infoprint " +-- InnoDB Log Buffer Free: " . hr_bytes($mystat{'Innodb_buffer_pool_pages_free'}) . "\n";
		}
		if (defined $mystat{'Innodb_buffer_pool_pages_total'}) {
			infoprint " +-- InnoDB Log Buffer Used: " . hr_bytes($mystat{'Innodb_buffer_pool_pages_total'}) . "\n";
		}
	}
	# InnoDB Buffer Pull Size
	if ($myvar{'innodb_buffer_pool_size'} > $enginestats{'InnoDB'}) {
		goodprint "InnoDB buffer pool / data size: ".hr_bytes($myvar{'innodb_buffer_pool_size'})."/".hr_bytes($enginestats{'InnoDB'})."\n";
	} else {
		badprint "InnoDB  buffer pool / data size: ".hr_bytes($myvar{'innodb_buffer_pool_size'})."/".hr_bytes($enginestats{'InnoDB'})."\n";
		push(@adjvars,"innodb_buffer_pool_size (>= ".hr_bytes_rnd($enginestats{'InnoDB'}).") if possible.");
	}

	# InnoDB Buffer Pull Instances (MySQL 5.6.6+)
	if (defined($myvar{'innodb_buffer_pool_instances'})) {
		# Bad Value if > 64
		if ($myvar{'innodb_buffer_pool_instances'} > 64) {
			badprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
			push(@adjvars,"innodb_buffer_pool_instances (<= 64)");
		} 
		
		# InnoDB Buffer Pull Size > 1Go
		if ($myvar{'innodb_buffer_pool_size'} > 1024*1024*1024) {
			# InnoDB Buffer Pull Size / 1Go = InnoDB Buffer Pull Instances
			if ($myvar{'innodb_buffer_pool_instances'} != int($myvar{'innodb_buffer_pool_size'}/(1024*1024*1024))) {
				badprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
				push(@adjvars,"innodb_buffer_pool_instances(=".int($myvar{'innodb_buffer_pool_size'}/(1024*1024*1024)).")");
			} else {
				goodprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
			}	
		# InnoDB Buffer Pull Size < 1Go
		} else {
			if ($myvar{'innodb_buffer_pool_instances'} != 1) {
				badprint "InnoDB buffer pool <= 1G and innodb_buffer_pool_instances(!=1).\n";
				push(@adjvars,"innodb_buffer_pool_instances (=1)");
			} else {
				goodprint "InnoDB buffer pool instances: ".$myvar{'innodb_buffer_pool_instances'}."\n";
			}
		}
	}

	# InnoDB Used Buffer Pool
	if (defined $mycalc{'pct_innodb_buffer_used'} && $mycalc{'pct_innodb_buffer_used'} < 80 ) {
		badprint "InnoDB Used buffer: ".$mycalc{'pct_innodb_buffer_used'}. "% (".($mystat{'Innodb_buffer_pool_pages_total'} - $mystat{'Innodb_buffer_pool_pages_free'})." used/ ".$mystat{'Innodb_buffer_pool_pages_total'}." total)\n";
	} else {
		goodprint "InnoDB Used buffer: ".$mycalc{'pct_innodb_buffer_used'}. "% (".($mystat{'Innodb_buffer_pool_pages_total'} - $mystat{'Innodb_buffer_pool_pages_free'})." used/ ".$mystat{'Innodb_buffer_pool_pages_total'}." total)\n";
	}

	# InnoDB Read efficency
	if (defined $mycalc{'pct_read_efficiency'} && $mycalc{'pct_read_efficiency'} < 90 ) {
		badprint "InnoDB Read buffer efficiency: ".$mycalc{'pct_read_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_read_requests'} - $mystat{'Innodb_buffer_pool_reads'})." hits/ ".$mystat{'Innodb_buffer_pool_read_requests'}." total)\n";
	} else {
		goodprint "InnoDB Read buffer efficiency: ".$mycalc{'pct_read_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_read_requests'} - $mystat{'Innodb_buffer_pool_reads'})." hits/ ".$mystat{'Innodb_buffer_pool_read_requests'}." total)\n";
	}

	# InnoDB Write efficency
	if (defined $mycalc{'pct_write_efficiency'} && $mycalc{'pct_write_efficiency'} < 90 ) {
		badprint "InnoDB Write buffer efficiency: ".$mycalc{'pct_write_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_write_requests'} - $mystat{'Innodb_buffer_pool_writes'})." hits/ ".$mystat{'Innodb_buffer_pool_write_requests'}." total)\n";
	} else {
		goodprint "InnoDB Write buffer efficiency: ".$mycalc{'pct_write_efficiency'}. "% (".($mystat{'Innodb_buffer_pool_write_requests'} - $mystat{'Innodb_buffer_pool_writes'})." hits/ ".$mystat{'Innodb_buffer_pool_write_requests'}." total)\n";
	}

	# InnoDB Log Waits
	if (defined $mystat{'Innodb_log_waits'} && $mystat{'Innodb_log_waits'} > 0) {
		badprint "InnoDB log waits: ".percentage($mystat{'Innodb_log_waits'}, $mystat{'Innodb_log_writes'})."% (".$mystat{'Innodb_log_waits'}. " waits / ".$mystat{'Innodb_log_writes'}." writes)\n";
		push(@adjvars,"innodb_log_buffer_size (>= ".hr_bytes_rnd($myvar{'innodb_log_buffer_size'}).")");
	} else {
		goodprint "InnoDB log waits: ".percentage($mystat{'Innodb_log_waits'}, $mystat{'Innodb_log_writes'})."% (".$mystat{'Innodb_log_waits'}. " waits / ".$mystat{'Innodb_log_writes'}." writes)\n";
	}
}

# Recommandations for MySQL Databases
sub mysql_databases {
	if ($opt{dbstat} == 0) {
		return;
	}
	prettyprint "\n-------- Database Metrics ------------------------------------------------\n";
	unless (mysql_version_ge(5,5)) {
		infoprint "Skip Database metrics from information schema missing in this version\n";
		return;
	}

	my @dblist=select_array("SHOW DATABASES;");
	infoprint "There is ".scalar(@dblist). " Database(s).\n";
	my @totaldbinfo=split /\s/, select_one("SELECT SUM(TABLE_ROWS), SUM(DATA_LENGTH), SUM(INDEX_LENGTH) , SUM(DATA_LENGTH+INDEX_LENGTH) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('mysql', 'performance_schema', 'information_schema');");
	infoprint "All Databases:\n";
	infoprint " +-- ROWS : ".($totaldbinfo[0] eq 'NULL'?0:$totaldbinfo[0])."\n";
	infoprint " +-- DATA : ".hr_bytes($totaldbinfo[1])."(".percentage($totaldbinfo[1], $totaldbinfo[3])."%)\n";
	infoprint " +-- INDEX: ".hr_bytes($totaldbinfo[2])."(".percentage($totaldbinfo[2], $totaldbinfo[3])."%)\n";
	infoprint " +-- SIZE : ".hr_bytes($totaldbinfo[3])."\n";
	badprint "Index size is larger than data size \n" if $totaldbinfo[1]<$totaldbinfo[2];
	foreach (@dblist) { 
		chomp($_);
		if ( $_ eq "information_schema" or $_ eq "performance_schema" or $_ eq "mysql" ) { next; }

		my @dbinfo=split /\s/, select_one("SELECT TABLE_SCHEMA, SUM(TABLE_ROWS), SUM(DATA_LENGTH), SUM(INDEX_LENGTH) , SUM(DATA_LENGTH+INDEX_LENGTH), COUNT(DISTINCT ENGINE) FROM information_schema.TABLES WHERE TABLE_SCHEMA='$_' GROUP BY TABLE_SCHEMA ORDER BY TABLE_SCHEMA");
		infoprint "Database: ".$dbinfo[0]."\n";
		infoprint " +-- ROWS : ".(!defined($dbinfo[1]) or $dbinfo[1] eq 'NULL'?0:$dbinfo[1])."\n";
		infoprint " +-- DATA : ".hr_bytes($dbinfo[2])."(".percentage($dbinfo[2], $dbinfo[4])."%)\n";
		infoprint " +-- INDEX: ".hr_bytes($dbinfo[3])."(".percentage($dbinfo[3], $dbinfo[4])."%)\n";
		infoprint " +-- TOTAL: ".hr_bytes($dbinfo[4])."\n";
		badprint "Index size is larger than data size for $dbinfo[0] \n" if $dbinfo[2]<$dbinfo[3];
		badprint "There ".$dbinfo[5]. " storage engines. Be careful \n" if $dbinfo[5]>1;
	}
}

# Recommandations for MySQL Databases
sub mysql_indexes {
	return if ($opt{idxstat} == 0);

	prettyprint "\n-------- Indexes Metrics -------------------------------------------------\n";
	unless (mysql_version_ge(5,5)) {
		infoprint "Skip Index metrics from information schema missing in this version\n";
		return;
	}
	my $selIdxReq= <<'ENDSQL';
SELECT
  CONCAT(CONCAT(t.TABLE_SCHEMA, '.'),t.TABLE_NAME) AS 'table'
 , CONCAT(CONCAT(CONCAT(s.INDEX_NAME, '('),s.COLUMN_NAME), ')') AS 'index'
 , s.SEQ_IN_INDEX AS 'seq'
 , s2.max_columns AS 'maxcol'
 , s.CARDINALITY  AS 'card'
 , t.TABLE_ROWS   AS 'est_rows'
 , ROUND(((s.CARDINALITY / IFNULL(t.TABLE_ROWS, 0.01)) * 100), 2) AS 'sel'
FROM INFORMATION_SCHEMA.STATISTICS s
 INNER JOIN INFORMATION_SCHEMA.TABLES t
  ON s.TABLE_SCHEMA = t.TABLE_SCHEMA
  AND s.TABLE_NAME = t.TABLE_NAME
 INNER JOIN (
  SELECT 
     TABLE_SCHEMA
   , TABLE_NAME
   , INDEX_NAME
   , MAX(SEQ_IN_INDEX) AS max_columns
  FROM INFORMATION_SCHEMA.STATISTICS
  WHERE TABLE_SCHEMA NOT IN ('mysql', 'information_schema', 'performance_schema')
  GROUP BY TABLE_SCHEMA, TABLE_NAME, INDEX_NAME
 ) AS s2
 ON s.TABLE_SCHEMA = s2.TABLE_SCHEMA
 AND s.TABLE_NAME = s2.TABLE_NAME
 AND s.INDEX_NAME = s2.INDEX_NAME
WHERE t.TABLE_SCHEMA NOT IN ('mysql', 'information_schema', 'performance_schema')
AND t.TABLE_ROWS > 10
AND s.CARDINALITY IS NOT NULL
AND (s.CARDINALITY / IFNULL(t.TABLE_ROWS, 0.01)) < 8.00
ORDER BY sel
LIMIT 10;
ENDSQL
	my @idxinfo=select_array($selIdxReq);
	infoprint "Worst selectivity indexes:\n";
	foreach (@idxinfo) {
		debugprint "$_\n";
		my @info= split /\s/;
		infoprint "Index: ".$info[1]."\n";
		
		infoprint " +-- COLONNE     : ".$info[0]."\n";
		infoprint " +-- NB SEQS     : ".$info[2]." sequence(s)\n";
		infoprint " +-- NB COLS     : ".$info[3]." column(s)\n";
		infoprint " +-- CARDINALITY : ".$info[4]." distinct values\n";
		infoprint " +-- NB ROWS     : ".$info[5]." rows\n";
		infoprint " +-- SELECTIVITY : ".$info[6]."%\n";
		if ($info[6] < 25) {
			badprint "$info[1] has a low selectivity\n";
		}
	}

	return unless (defined($myvar{'performance_schema'}) and $myvar{'performance_schema'} eq 'ON' );

	$selIdxReq= <<'ENDSQL';
SELECT CONCAT(CONCAT(object_schema,'.'),object_name) AS 'table', index_name 
FROM performance_schema.table_io_waits_summary_by_index_usage
WHERE index_name IS NOT NULL
AND count_star =0  
AND index_name <> 'PRIMARY' 
AND object_schema != 'mysql' 
ORDER BY count_star, object_schema, object_name;
ENDSQL
	@idxinfo=select_array($selIdxReq);
	infoprint "Unsused indexes:\n";
	push(@generalrec, "Remove unused indexes.") if (scalar(@idxinfo)>0);
	foreach (@idxinfo) {
		debugprint "$_\n";
		my @info= split /\s/;
		badprint "Index: $info[1] on $info[0] is not used.\n";
	}	
}
# Take the two recommendation arrays and display them at the end of the output
sub make_recommendations {
	prettyprint "\n-------- Recommendations -----------------------------------------------------\n";
	if (@generalrec > 0) {
		prettyprint "General recommendations:\n";
		foreach (@generalrec) { prettyprint "    ".$_."\n"; }
	}
	if (@adjvars > 0) {
		prettyprint "Variables to adjust:\n";
		if ($mycalc{'pct_physical_memory'} > 90) {
			prettyprint "  *** MySQL's maximum memory usage is dangerously high ***\n".
				  "  *** Add RAM before increasing MySQL buffer variables ***\n";
		}
		foreach (@adjvars) { prettyprint "    ".$_."\n"; }
	}
	if (@generalrec == 0 && @adjvars ==0) {
		prettyprint "No additional performance recommendations are available.\n"
	}
}
sub close_reportfile {
	close($fh) if defined($fh);
}

sub headerprint {
	prettyprint	" >>  MySQLTuner $tunerversion - Major Hayden <major\@mhtx.net>\n".
		" >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
		" >>  Run with '--help' for additional options and output filtering\n";
}

sub dump_result {
	$Data::Dumper::Pair = " : ";
	print Dumper(\%result);
	exit 0;
}
# ---------------------------------------------------------------------------
# BEGIN 'MAIN'
# ---------------------------------------------------------------------------
headerprint					# Header Print
mysql_setup;				# Gotta login first
os_setup;					# Set up some OS variables
get_all_vars;				# Toss variables/status into hashes
get_tuning_info;			# Get information about the tuning connexion
validate_mysql_version;		# Check current MySQL version
check_architecture;			# Suggest 64-bit upgrade
check_storage_engines;		# Show enabled storage engines
mysql_databases;			# Show informations about databases
mysql_indexes;				# Show informations about indexes
security_recommendations;	# Display some security recommendations
calculations;				# Calculate everything we need
mysql_stats;				# Print the server stats
mysql_innodb;				# Print InnoDB stats
get_replication_status;		# Print replication info
make_recommendations;		# Make recommendations based on stats
close_reportfile;			# Close reportfile if needed

# ---------------------------------------------------------------------------
# END 'MAIN'
# ---------------------------------------------------------------------------
__END__

=pod

=encoding UTF-8

=head1 NAME

 MySQLTuner 1.5.0 - MySQL High Performance Tuning Script

=head1 IMPORTANT USAGE GUIDELINES

To run the script with the default options, run the script without arguments
Allow MySQL server to run for at least 24-48 hours before trusting suggestions
Some routines may require root level privileges (script will provide warnings)
You must provide the remote server's total memory when connecting to other servers

=head1 CONNECTION AND AUTHENTIFICATION

 --host <hostname>    Connect to a remote host to perform tests (default: localhost)
 --socket <socket>    Use a different socket for a local connection
 --port <port>        Port to use for connection (default: 3306)
 --user <username>    Username to use for authentication
 --pass <password>    Password to use for authentication
 --mysqladmin <path>  Path to a custom mysqladmin executable
 --mysqlcmd <path>    Path to a custom mysql executable

=head1 PERFORMANCE AND REPORTING OPTIONS

 --skipsize           Don't enumerate tables and their types/sizes (default: on)
                      (Recommended for servers with many tables)
 --skippassword       Don't perform checks on user passwords(default: off)
 --checkversion       Check for updates to MySQLTuner (default: don't check)
 --forcemem <size>    Amount of RAM installed in megabytes
 --forceswap <size>   Amount of swap memory configured in megabytes
 --passwordfile <path>Path to a password file list(one password by line)
 --reportfile <path>  Path to a report txt file

=head1 OUTPUT OPTIONS

 --nogood             Remove OK responses
 --nobad              Remove negative/suggestion responses
 --noinfo             Remove informational responses
 --debug              Print debug information
 --dbstat             Print database information
 --idxstat            Print index information
 --nocolor            Don't print output in color
 --buffers            Print global and per-thread buffer values

=head1 PERLDOC

You can find documentation for this module with the perldoc command.

  perldoc mysqltuner

=head1 AUTHORS

Major Hayden - major@mhtx.net

=head1 CONTRIBUTORS

=over 4

=item *

Matthew Montgomery

=item *

Paul Kehrer

=item *

Dave Burgess

=item *

Jonathan Hinds

=item *

Mike Jackson

=item *

Nils Breunese

=item *

Shawn Ashlee

=item *

Luuk Vosslamber

=item *

Ville Skytta

=item *

Trent Hornibrook

=item *

Jason Gill

=item *

Mark Imbriaco

=item *

Greg Eden

=item *

Aubin Galinotti

=item *

Giovanni Bechis

=item *

Bill Bradford

=item *

Ryan Novosielski

=item *

Michael Scheidell

=item *

Blair Christensen

=item *

Hans du Plooy

=item *

Victor Trac

=item *

Everett Barnes

=item *

Tom Krouper

=item *

Gary Barrueto

=item *

Simon Greenaway

=item *

Adam Stein

=item *

Isart Montane

=item *

Baptiste M.

=item *

Cole Turner

=item *

Major Hayden

=item *

Joe Ashcraft

=item *

Jean-Marie Renouard

=back

=head1 SUPPORT


Bug reports, feature requests, and downloads at http://mysqltuner.com/

Bug tracker can be found at https://github.com/major/MySQLTuner-perl/issues

Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL

=head1 SOURCE CODE

L<https://github.com/major/MySQLTuner-perl>

 git clone https://github.com/major/MySQLTuner-perl.git

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2006-2015 Major Hayden - major@mhtx.net

For the latest updates, please visit http://mysqltuner.com/

Git repository available at http://github.com/major/MySQLTuner-perl

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

=cut

# Local variables:
# indent-tabs-mode: t
# cperl-indent-level: 8
# perl-indent-level: 8
# End: