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#193 adding some useful extraction for sysschema

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root 2016-09-19 16:13:22 +02:00
parent 2b6a0c3522
commit 972bf2e4ae
1 changed files with 47 additions and 18 deletions
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65
mysqltuner.pl
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@ -1,5 +1,5 @@
#!/usr/bin/env perl
# mysqltuner.pl - Version 1.6.18
# mysqltuner.pl - Version 1.6.19
# High Performance MySQL Tuning Script
# Copyright (C) 2006-2016 Major Hayden - major@mhtx.net
#
@ -54,7 +54,7 @@ $Data::Dumper::Pair = " : ";
#use Env;
# Set up a few variables for use in the script
my $tunerversion = "1.6.18";
my $tunerversion = "1.6.19";
my ( @adjvars, @generalrec );
# Set defaults
@ -3132,7 +3132,7 @@ sub get_pf_memory {
return 0 unless defined $myvar{'performance_schema'};
return 0 if $myvar{'performance_schema'} eq 'OFF';
my @infoaMemory = grep /performance_schema.memory/,
my @infoPFSMemory = grep /performance_schema.memory/,
select_array("SHOW ENGINE PERFORMANCE_SCHEMA STATUS");
return 0 if scalar(@infoPFSMemory) == 0;
$infoPFSMemory[0] =~ s/.*\s+(\d+)$/$1/g;
@ -3153,24 +3153,53 @@ sub mysqsl_pfs {
infoprint "Performance schema is enabled.";
infoprint "Memory used by P_S: " . hr_bytes( get_pf_memory() );
if ( grep /^sys$/, select_array("SHOW DATABASES") ) {
infoprint "Sys schema is installed.";
}
else {
infoprint "Sys schema isn't installed.";
return;
unless ( grep /^sys$/, select_array("SHOW DATABASES") ) {
infoprint "Sys schema isn't installed.";
return;
}
infoprint "Sys schema is installed.";
#*High Cost SQL statements
#select * from sys.`x$statement_analysis`
#* Top 5% slower queries
#select * from sys.`x$statements_with_runtimes_in_95th_percentile`
#*Use temporary tables
#select * from sys.`statements_with_temp_tables`
#*Unused Indexes
#select * from sys.`schema_unused_indexes`
#* Full table scans select * from sys.`schema_tables_with_full_table_scans`
infoprint "Top 5 Most latency statements:";
my $nbL=1;
for my $lQuery(select_array ('select query, avg_latency from sys.statement_analysis order by avg_latency desc LIMIT 5')) {
infoprint " +-- $nbL: $lQuery";
$nbL++;
}
#* Top 5% slower queries
infoprint "Top 5 slower queries:";
$nbL=1;
for my $lQuery(select_array ('select query, exec_count from sys.statements_with_runtimes_in_95th_percentile order by exec_count desc LIMIT 5')) {
infoprint " +-- $nbL: $lQuery s";
$nbL++;
}
#*Use temporary tables
infoprint "Some queries using temp table:";
$nbL=1;
for my $lQuery(select_array ('select query from sys.statements_with_temp_tables LIMIT 20')) {
infoprint " +-- $nbL: $lQuery";
$nbL++;
}
#*Unused Indexes
infoprint "Unused indexes:";
$nbL=1;
for my $lQuery(select_array ('select * from sys.schema_unused_indexes')) {
infoprint " +-- $nbL: $lQuery";
$nbL++;
}
#* Full table scans
#select * from sys.`schema_tables_with_full_table_scans`
infoprint "Tables with full table scans:";
$nbL=1;
for my $lQuery(select_array ('select * from sys.schema_tables_with_full_table_scans order by rows_full_scanned DESC')) {
infoprint " +-- $nbL: $lQuery";
$nbL++;
}
}
# Recommendations for Ariadb
@ -4229,7 +4258,7 @@ __END__
=head1 NAME
MySQLTuner 1.6.18 - MySQL High Performance Tuning Script
MySQLTuner 1.6.19 - MySQL High Performance Tuning Script
=head1 IMPORTANT USAGE GUIDELINES