diff --git a/USAGE.md b/USAGE.md
index c63d361b3..9fa4e1677 100644
--- a/USAGE.md
+++ b/USAGE.md
@@ -1,6 +1,6 @@
 # NAME
 
-    MySQLTuner 2.5.2 - MySQL High Performance Tuning Script
+    MySQLTuner 2.5.3 - MySQL High Performance Tuning Script
 
 # IMPORTANT USAGE GUIDELINES
 
diff --git a/mysqltuner.pl b/mysqltuner.pl
index 21e185825..f891b11b0 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -1,5 +1,5 @@
-#!/usr/bin/perl
-# mysqltuner.pl - Version 2.5.2
+#!env perl
+# mysqltuner.pl - Version 2.5.3
 # High Performance MySQL Tuning Script
 # Copyright (C) 2015-2023 Jean-Marie Renouard - jmrenouard@gmail.com
 # Copyright (C) 2006-2023 Major Hayden - major@mhtx.net
@@ -57,7 +57,7 @@ package main;
 #use Env;
 
 # Set up a few variables for use in the script
-my $tunerversion = "2.5.2";
+my $tunerversion = "2.5.3";
 my ( @adjvars, @generalrec );
 
 # Set defaults
@@ -109,6 +109,7 @@ package main;
     "prettyjson"          => 0,
     "reportfile"          => 0,
     "verbose"             => 0,
+    "experimental"        => 0,
     "defaults-file"       => '',
     "defaults-extra-file" => '',
     "protocol"            => '',
@@ -151,7 +152,7 @@ package main;
     'server-log=s',          'protocol=s',
     'defaults-extra-file=s', 'dumpdir=s',
     'feature=s',             'dbgpattern=s',
-    'defaultarch=i'
+    'defaultarch=i',         'experimental'
   )
   or pod2usage(
     -exitval  => 1,
@@ -209,6 +210,11 @@ package main;
 
 $opt{dbgpattern} = '.*' if ( $opt{dbgpattern} eq '' );
 
+# Activate debug variables
+#if ( $opt{debug} ne '' ) { $opt{debug} = 2; }
+# Activate experimental calculations and analysis
+ #if ( $opt{experimental} ne '' ) { $opt{experimental} = 1; }
+
 # check if we need to enable verbose mode
 if ( $opt{feature} ne '' ) { $opt{verbose} = 1; }
 if ( $opt{verbose} ) {
@@ -2530,7 +2536,7 @@ sub check_architecture {
     }
     elsif ( `uname` =~ /Darwin/ && `uname -m` =~ /x86_64/ ) {
 
-# Darwin gibas.local 12.5.2 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
+# Darwin gibas.local 12.5.3 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
         $arch = 64;
         goodprint "Operating on 64-bit architecture";
     }
@@ -3219,8 +3225,8 @@ sub calculations {
             "select  round( 100* sum(allocated)/( select VARIABLE_VALUE "
           . "FROM performance_schema.global_variables "
           . "WHERE VARIABLE_NAME='innodb_buffer_pool_size' ) ,2)"
-          . 'FROM sys.x\$innodb_buffer_stats_by_table;' );
-
+          . 'FROM sys.x\$innodb_buffer_stats_by_table;' )
+    if ($opt{experimental});
     # Binlog Cache
     if ( $myvar{'log_bin'} ne 'OFF' ) {
         $mycalc{'pct_binlog_cache'} = percentage(
@@ -6372,14 +6378,16 @@ sub mysql_innodb {
   # ,2) as "PCT ALLOC/BUFFER POOL"
   #from sys.x$innodb_buffer_stats_by_table;
 
-    if (defined $mycalc{innodb_buffer_alloc_pct}) {
-      if ( $mycalc{innodb_buffer_alloc_pct} < 80 ) {
-          badprint "Ratio Buffer Pool allocated / Buffer Pool Size: "
-            . $mycalc{'innodb_buffer_alloc_pct'} . '%';
-      }
-      else {
-          goodprint "Ratio Buffer Pool allocated / Buffer Pool Size: "
-            . $mycalc{'innodb_buffer_alloc_pct'} . '%';
+    if ( $opt{experimental} ) {
+      if (defined $mycalc{innodb_buffer_alloc_pct}) {
+        if ( $mycalc{innodb_buffer_alloc_pct} < 80 ) {
+            badprint "Ratio Buffer Pool allocated / Buffer Pool Size: "
+              . $mycalc{'innodb_buffer_alloc_pct'} . '%';
+        }
+        else {
+            goodprint "Ratio Buffer Pool allocated / Buffer Pool Size: "
+              . $mycalc{'innodb_buffer_alloc_pct'} . '%';
+        }
       }
     }
     if (   $mycalc{'innodb_log_size_pct'} < 20
@@ -6408,7 +6416,7 @@ sub mysql_innodb {
               . $myvar{'innodb_log_files_in_group'} . " / "
               . hr_bytes( $myvar{'innodb_buffer_pool_size'} )
               . " should be equal to 25%";
-            push(
+           push(
                 @adjvars,
                 "innodb_log_file_size should be (="
                   . hr_bytes_rnd(
@@ -7201,6 +7209,8 @@ sub headerprint {
       . "\t * Major Hayden <major\@mhtx.net>\n"
       . " >>  Bug reports, feature requests, and downloads at http://mysqltuner.pl/\n"
       . " >>  Run with '--help' for additional options and output filtering";
+    debugprint("Debug: ".$opt{debug});
+    debugprint("Experimental: ".$opt{experimental});
 }
 
 sub string2file {
@@ -7211,12 +7221,12 @@ sub string2file {
 "Unable to open $filename in write mode. Please check permissions for this file or directory";
     print $fh $content if defined($content);
     close $fh;
-    debugprint $content if ( $opt{'debug'} );
+    debugprint $content;
 }
 
 sub file2array {
     my $filename = shift;
-    debugprint "* reading $filename" if ( $opt{'debug'} );
+    debugprint "* reading $filename";
     my $fh;
     open( $fh, q(<), "$filename" )
       or die "Couldn't open $filename for reading: $!\n";
@@ -7402,7 +7412,7 @@ sub which {
 
 =head1 NAME
 
- MySQLTuner 2.5.2 - MySQL High Performance Tuning Script
+ MySQLTuner 2.5.3 - MySQL High Performance Tuning Script
 
 =head1 IMPORTANT USAGE GUIDELINES