From 80def039234b042dd5781e8ca4c3ddd7251e1644 Mon Sep 17 00:00:00 2001
From: root <jmrenouard@gmail.com>
Date: Mon, 18 Apr 2016 11:07:05 +0200
Subject: [PATCH] #187 enforce control over P_S activation

---
 mysqltuner.pl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mysqltuner.pl b/mysqltuner.pl
index c174c00..1aee004 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -2967,9 +2967,11 @@ sub mariadb_threadpool {
 sub get_pf_memory 
 {
     # Performance Schema
-    return 0 unless ( defined( $myvar{'performance_schema'} ) and $myvar{'performance_schema'} eq 'ON' );
-
+    return 0 unless defined $myvar{'performance_schema'};
+    return 0 if $myvar{'performance_schema'} eq 'OFF';
+    
     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;
     return $infoPFSMemory[0];
 }