From 2a808027641bb2f15586383a9913dfe200cacabe Mon Sep 17 00:00:00 2001
From: Jean-Marie RENOUARD <jmrenouard@gmail.com>
Date: Mon, 13 Jul 2015 16:58:24 +0200
Subject: [PATCH] Adding check for percentage used buffer pool

---
 mysqltuner.pl | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/mysqltuner.pl b/mysqltuner.pl
index 99cc21d..14111ff 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -1,5 +1,5 @@
 #!/usr/bin/perl -w
-# mysqltuner.pl - Version 1.4.7
+# mysqltuner.pl - Version 1.4.8
 # High Performance MySQL Tuning Script
 # Copyright (C) 2006-2015 Major Hayden - major@mhtx.net
 #
@@ -1036,6 +1036,7 @@ sub calculations {
 	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') {
@@ -1358,6 +1359,12 @@ sub mysql_innodb {
 		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'}) {
@@ -1395,6 +1402,13 @@ sub mysql_innodb {
 		}
 	}
 
+	# 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";