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967 lines
41 KiB
967 lines
41 KiB
10 years ago
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#!/usr/bin/perl -w
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# mysqltuner.pl - Version 1.2.0
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# High Performance MySQL Tuning Script
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# Copyright (C) 2006-2011 Major Hayden - major@mhtx.net
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#
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# For the latest updates, please visit http://mysqltuner.com/
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# Git repository available at http://github.com/rackerhacker/MySQLTuner-perl
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This project would not be possible without help from:
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# Matthew Montgomery Paul Kehrer Dave Burgess
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# Jonathan Hinds Mike Jackson Nils Breunese
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# Shawn Ashlee Luuk Vosslamber Ville Skytta
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# Trent Hornibrook Jason Gill Mark Imbriaco
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# Greg Eden Aubin Galinotti Giovanni Bechis
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# Bill Bradford Ryan Novosielski Michael Scheidell
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# Blair Christensen Hans du Plooy Victor Trac
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# Everett Barnes Tom Krouper Gary Barrueto
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# Simon Greenaway Adam Stein Isart Montane
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# Baptiste M.
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#
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# Inspired by Matthew Montgomery's tuning-primer.sh script:
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# http://forge.mysql.com/projects/view.php?id=44
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#
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use strict;
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use warnings;
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use diagnostics;
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use File::Spec;
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use Getopt::Long;
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# Set up a few variables for use in the script
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my $tunerversion = "1.2.0";
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my (@adjvars, @generalrec);
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# Set defaults
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my %opt = (
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"nobad" => 0,
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"nogood" => 0,
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"noinfo" => 0,
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"nocolor" => 0,
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"forcemem" => 0,
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"forceswap" => 0,
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"host" => 0,
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"socket" => 0,
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"port" => 0,
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"user" => 0,
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"pass" => 0,
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"skipsize" => 0,
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"checkversion" => 0,
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);
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# Gather the options from the command line
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GetOptions(\%opt,
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'nobad',
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'nogood',
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'noinfo',
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'nocolor',
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'forcemem=i',
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'forceswap=i',
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'host=s',
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'socket=s',
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'port=i',
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'user=s',
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'pass=s',
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'skipsize',
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'checkversion',
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'help',
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);
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if (defined $opt{'help'} && $opt{'help'} == 1) { usage(); }
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sub usage {
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# Shown with --help option passed
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print "\n".
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" MySQLTuner $tunerversion - MySQL High Performance Tuning Script\n".
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" Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
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" Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL\n".
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"\n".
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" Important Usage Guidelines:\n".
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" To run the script with the default options, run the script without arguments\n".
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" Allow MySQL server to run for at least 24-48 hours before trusting suggestions\n".
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" Some routines may require root level privileges (script will provide warnings)\n".
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" You must provide the remote server's total memory when connecting to other servers\n".
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"\n".
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" Connection and Authentication\n".
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" --host <hostname> Connect to a remote host to perform tests (default: localhost)\n".
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" --socket <socket> Use a different socket for a local connection\n".
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" --port <port> Port to use for connection (default: 3306)\n".
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" --user <username> Username to use for authentication\n".
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" --pass <password> Password to use for authentication\n".
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"\n".
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" Performance and Reporting Options\n".
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" --skipsize Don't enumerate tables and their types/sizes (default: on)\n".
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" (Recommended for servers with many tables)\n".
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" --checkversion Check for updates to MySQLTuner (default: don't check)\n".
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" --forcemem <size> Amount of RAM installed in megabytes\n".
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" --forceswap <size> Amount of swap memory configured in megabytes\n".
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"\n".
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" Output Options:\n".
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" --nogood Remove OK responses\n".
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" --nobad Remove negative/suggestion responses\n".
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" --noinfo Remove informational responses\n".
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" --nocolor Don't print output in color\n".
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"\n";
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exit;
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}
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my $devnull = File::Spec->devnull();
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# Setting up the colors for the print styles
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my $good = ($opt{nocolor} == 0)? "[\e[0;32mOK\e[0m]" : "[OK]" ;
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my $bad = ($opt{nocolor} == 0)? "[\e[0;31m!!\e[0m]" : "[!!]" ;
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my $info = ($opt{nocolor} == 0)? "[\e[0;34m--\e[0m]" : "[--]" ;
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# Functions that handle the print styles
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sub goodprint { print $good." ".$_[0] unless ($opt{nogood} == 1); }
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sub infoprint { print $info." ".$_[0] unless ($opt{noinfo} == 1); }
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sub badprint { print $bad." ".$_[0] unless ($opt{nobad} == 1); }
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sub redwrap { return ($opt{nocolor} == 0)? "\e[0;31m".$_[0]."\e[0m" : $_[0] ; }
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sub greenwrap { return ($opt{nocolor} == 0)? "\e[0;32m".$_[0]."\e[0m" : $_[0] ; }
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# Calculates the parameter passed in bytes, and then rounds it to one decimal place
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sub hr_bytes {
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my $num = shift;
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if ($num >= (1024**3)) { #GB
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return sprintf("%.1f",($num/(1024**3)))."G";
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} elsif ($num >= (1024**2)) { #MB
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return sprintf("%.1f",($num/(1024**2)))."M";
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} elsif ($num >= 1024) { #KB
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return sprintf("%.1f",($num/1024))."K";
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} else {
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return $num."B";
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}
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}
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# Calculates the parameter passed in bytes, and then rounds it to the nearest integer
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sub hr_bytes_rnd {
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my $num = shift;
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if ($num >= (1024**3)) { #GB
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return int(($num/(1024**3)))."G";
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} elsif ($num >= (1024**2)) { #MB
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return int(($num/(1024**2)))."M";
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} elsif ($num >= 1024) { #KB
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return int(($num/1024))."K";
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} else {
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return $num."B";
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}
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}
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# Calculates the parameter passed to the nearest power of 1000, then rounds it to the nearest integer
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sub hr_num {
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my $num = shift;
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if ($num >= (1000**3)) { # Billions
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return int(($num/(1000**3)))."B";
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} elsif ($num >= (1000**2)) { # Millions
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return int(($num/(1000**2)))."M";
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} elsif ($num >= 1000) { # Thousands
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return int(($num/1000))."K";
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} else {
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return $num;
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}
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}
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# Calculates uptime to display in a more attractive form
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sub pretty_uptime {
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my $uptime = shift;
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my $seconds = $uptime % 60;
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my $minutes = int(($uptime % 3600) / 60);
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my $hours = int(($uptime % 86400) / (3600));
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my $days = int($uptime / (86400));
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my $uptimestring;
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if ($days > 0) {
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$uptimestring = "${days}d ${hours}h ${minutes}m ${seconds}s";
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} elsif ($hours > 0) {
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$uptimestring = "${hours}h ${minutes}m ${seconds}s";
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} elsif ($minutes > 0) {
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$uptimestring = "${minutes}m ${seconds}s";
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} else {
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$uptimestring = "${seconds}s";
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}
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return $uptimestring;
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}
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# Retrieves the memory installed on this machine
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my ($physical_memory,$swap_memory,$duflags);
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sub os_setup {
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sub memerror {
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badprint "Unable to determine total memory/swap; use '--forcemem' and '--forceswap'\n";
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exit;
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}
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my $os = `uname`;
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$duflags = ($os =~ /Linux/) ? '-b' : '';
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if ($opt{'forcemem'} > 0) {
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$physical_memory = $opt{'forcemem'} * 1048576;
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infoprint "Assuming $opt{'forcemem'} MB of physical memory\n";
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if ($opt{'forceswap'} > 0) {
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$swap_memory = $opt{'forceswap'} * 1048576;
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infoprint "Assuming $opt{'forceswap'} MB of swap space\n";
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} else {
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$swap_memory = 0;
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badprint "Assuming 0 MB of swap space (use --forceswap to specify)\n";
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}
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} else {
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if ($os =~ /Linux/) {
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$physical_memory = `free -b | grep Mem | awk '{print \$2}'` or memerror;
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$swap_memory = `free -b | grep Swap | awk '{print \$2}'` or memerror;
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} elsif ($os =~ /Darwin/) {
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$physical_memory = `sysctl -n hw.memsize` or memerror;
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$swap_memory = `sysctl -n vm.swapusage | awk '{print \$3}' | sed 's/\..*\$//'` or memerror;
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} elsif ($os =~ /NetBSD|OpenBSD/) {
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$physical_memory = `sysctl -n hw.physmem` or memerror;
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if ($physical_memory < 0) {
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$physical_memory = `sysctl -n hw.physmem64` or memerror;
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}
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$swap_memory = `swapctl -l | grep '^/' | awk '{ s+= \$2 } END { print s }'` or memerror;
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} elsif ($os =~ /BSD/) {
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$physical_memory = `sysctl -n hw.realmem`;
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$swap_memory = `swapinfo | grep '^/' | awk '{ s+= \$2 } END { print s }'`;
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} elsif ($os =~ /SunOS/) {
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$physical_memory = `/usr/sbin/prtconf | grep Memory | cut -f 3 -d ' '` or memerror;
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chomp($physical_memory);
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$physical_memory = $physical_memory*1024*1024;
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} elsif ($os =~ /AIX/) {
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$physical_memory = `lsattr -El sys0 | grep realmem | awk '{print \$2}'` or memerror;
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chomp($physical_memory);
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$physical_memory = $physical_memory*1024;
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$swap_memory = `lsps -as | awk -F"(MB| +)" '/MB /{print \$2}'` or memerror;
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chomp($swap_memory);
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$swap_memory = $swap_memory*1024*1024;
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}
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}
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chomp($physical_memory);
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}
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# Checks to see if a MySQL login is possible
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my ($mysqllogin,$doremote,$remotestring);
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sub mysql_setup {
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$doremote = 0;
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$remotestring = '';
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my $command = `which mysqladmin`;
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chomp($command);
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if (! -e $command) {
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badprint "Unable to find mysqladmin in your \$PATH. Is MySQL installed?\n";
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exit;
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}
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# Are we being asked to connect via a socket?
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if ($opt{socket} ne 0) {
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$remotestring = " -S $opt{socket}";
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}
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# Are we being asked to connect to a remote server?
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if ($opt{host} ne 0) {
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chomp($opt{host});
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$opt{port} = ($opt{port} eq 0)? 3306 : $opt{port} ;
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# If we're doing a remote connection, but forcemem wasn't specified, we need to exit
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if ($opt{'forcemem'} eq 0) {
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badprint "The --forcemem option is required for remote connections\n";
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exit;
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}
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infoprint "Performing tests on $opt{host}:$opt{port}\n";
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$remotestring = " -h $opt{host} -P $opt{port}";
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$doremote = 1;
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}
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# Did we already get a username and password passed on the command line?
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if ($opt{user} ne 0 and $opt{pass} ne 0) {
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$mysqllogin = "-u $opt{user} -p'$opt{pass}'".$remotestring;
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my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
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if ($loginstatus =~ /mysqld is alive/) {
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goodprint "Logged in using credentials passed on the command line\n";
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return 1;
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} else {
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badprint "Attempted to use login credentials, but they were invalid\n";
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exit 0;
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}
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}
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if ( -r "/etc/psa/.psa.shadow" and $doremote == 0 ) {
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# It's a Plesk box, use the available credentials
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$mysqllogin = "-u admin -p`cat /etc/psa/.psa.shadow`";
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my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
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unless ($loginstatus =~ /mysqld is alive/) {
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badprint "Attempted to use login credentials from Plesk, but they failed.\n";
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exit 0;
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}
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} elsif ( -r "/etc/mysql/debian.cnf" and $doremote == 0 ){
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# We have a debian maintenance account, use it
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$mysqllogin = "--defaults-file=/etc/mysql/debian.cnf";
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my $loginstatus = `mysqladmin $mysqllogin ping 2>&1`;
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if ($loginstatus =~ /mysqld is alive/) {
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goodprint "Logged in using credentials from debian maintenance account.\n";
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return 1;
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} else {
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badprint "Attempted to use login credentials from debian maintenance account, but they failed.\n";
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exit 0;
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}
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} else {
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# It's not Plesk or debian, we should try a login
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my $loginstatus = `mysqladmin $remotestring ping 2>&1`;
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if ($loginstatus =~ /mysqld is alive/) {
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# Login went just fine
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$mysqllogin = " $remotestring ";
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# Did this go well because of a .my.cnf file or is there no password set?
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my $userpath = `printenv HOME`;
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if (length($userpath) > 0) {
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chomp($userpath);
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}
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unless ( -e "${userpath}/.my.cnf" ) {
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badprint "Successfully authenticated with no password - SECURITY RISK!\n";
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}
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return 1;
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} else {
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print STDERR "Please enter your MySQL administrative login: ";
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my $name = <>;
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print STDERR "Please enter your MySQL administrative password: ";
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system("stty -echo >$devnull 2>&1");
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my $password = <>;
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system("stty echo >$devnull 2>&1");
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chomp($password);
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chomp($name);
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|
|
$mysqllogin = "-u $name";
|
||
|
|
if (length($password) > 0) {
|
||
|
|
$mysqllogin .= " -p'$password'";
|
||
|
|
}
|
||
|
|
$mysqllogin .= $remotestring;
|
||
|
|
my $loginstatus = `mysqladmin 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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Populates all of the variable and status hashes
|
||
|
|
my (%mystat,%myvar,$dummyselect);
|
||
|
|
sub get_all_vars {
|
||
|
|
# We need to initiate at least one query so that our data is useable
|
||
|
|
$dummyselect = `mysql $mysqllogin -Bse "SELECT VERSION();"`;
|
||
|
|
my @mysqlvarlist = `mysql $mysqllogin -Bse "SHOW /*!50000 GLOBAL */ VARIABLES;"`;
|
||
|
|
foreach my $line (@mysqlvarlist) {
|
||
|
|
$line =~ /([a-zA-Z_]*)\s*(.*)/;
|
||
|
|
$myvar{$1} = $2;
|
||
|
|
}
|
||
|
|
my @mysqlstatlist = `mysql $mysqllogin -Bse "SHOW /*!50000 GLOBAL */ STATUS;"`;
|
||
|
|
foreach my $line (@mysqlstatlist) {
|
||
|
|
$line =~ /([a-zA-Z_]*)\s*(.*)/;
|
||
|
|
$mystat{$1} = $2;
|
||
|
|
}
|
||
|
|
# Workaround for MySQL bug #59393 wrt. ignore-builtin-innodb
|
||
|
|
if (($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 = `mysql $mysqllogin -Bse "SHOW ENGINES;" 2>$devnull`;
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub security_recommendations {
|
||
|
|
print "\n-------- Security Recommendations -------------------------------------------\n";
|
||
|
|
my @mysqlstatlist = `mysql $mysqllogin -Bse "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";
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
goodprint "All database users have passwords assigned\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub get_replication_status {
|
||
|
|
my $slave_status = `mysql $mysqllogin -Bse "show slave status\\G"`;
|
||
|
|
my ($io_running) = ($slave_status =~ /slave_io_running\S*\s+(\S+)/i);
|
||
|
|
my ($sql_running) = ($slave_status =~ /slave_sql_running\S*\s+(\S+)/i);
|
||
|
|
if ($io_running eq 'Yes' && $sql_running eq 'Yes') {
|
||
|
|
if ($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.";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Checks for updates to MySQLTuner
|
||
|
|
sub validate_tuner_version {
|
||
|
|
print "\n-------- General Statistics --------------------------------------------------\n";
|
||
|
|
if ($opt{checkversion} eq 0) {
|
||
|
|
infoprint "Skipped version check for MySQLTuner script\n";
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
my $update;
|
||
|
|
my $url = "http://mysqltuner.com/versioncheck.php?v=$tunerversion";
|
||
|
|
if (-e "/usr/bin/curl") {
|
||
|
|
$update = `/usr/bin/curl --connect-timeout 5 '$url' 2>$devnull`;
|
||
|
|
chomp($update);
|
||
|
|
} elsif (-e "/usr/bin/wget") {
|
||
|
|
$update = `/usr/bin/wget -e timestamping=off -T 5 -O - '$url' 2>$devnull`;
|
||
|
|
chomp($update);
|
||
|
|
}
|
||
|
|
if ($update eq 1) {
|
||
|
|
badprint "There is a new version of MySQLTuner available\n";
|
||
|
|
} elsif ($update eq 0) {
|
||
|
|
goodprint "You have the latest version of MySQLTuner\n";
|
||
|
|
} else {
|
||
|
|
infoprint "Unable to check for the latest MySQLTuner version\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Checks for supported or EOL'ed MySQL versions
|
||
|
|
my ($mysqlvermajor,$mysqlverminor);
|
||
|
|
sub validate_mysql_version {
|
||
|
|
($mysqlvermajor,$mysqlverminor) = $myvar{'version'} =~ /(\d)\.(\d)/;
|
||
|
|
if (!mysql_version_ge(5)) {
|
||
|
|
badprint "Your MySQL version ".$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)
|
||
|
|
sub mysql_version_ge {
|
||
|
|
my ($maj, $min) = @_;
|
||
|
|
return $mysqlvermajor > $maj || ($mysqlvermajor == $maj && $mysqlverminor >= ($min || 0));
|
||
|
|
}
|
||
|
|
|
||
|
|
# 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";
|
||
|
|
} 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";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Start up a ton of storage engine counts/statistics
|
||
|
|
my (%enginestats,%enginecount,$fragtables);
|
||
|
|
sub check_storage_engines {
|
||
|
|
if ($opt{skipsize} eq 1) {
|
||
|
|
print "\n-------- Storage Engine Statistics -------------------------------------------\n";
|
||
|
|
infoprint "Skipped due to --skipsize option\n";
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
print "\n-------- Storage Engine Statistics -------------------------------------------\n";
|
||
|
|
infoprint "Status: ";
|
||
|
|
my $engines;
|
||
|
|
$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'} && $myvar{'have_ndbcluster'} eq "YES")? greenwrap "+NDBCluster " : redwrap "-NDBCluster " ;
|
||
|
|
print "$engines\n";
|
||
|
|
if (mysql_version_ge(5)) {
|
||
|
|
# MySQL 5 servers can have table sizes calculated quickly from information schema
|
||
|
|
my @templist = `mysql $mysqllogin -Bse "SELECT ENGINE,SUM(DATA_LENGTH),COUNT(ENGINE) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_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 = `mysql $mysqllogin -Bse "SELECT COUNT(TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema','mysql') AND Data_free > 0 AND NOT ENGINE='MEMORY';"`;
|
||
|
|
chomp($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 = `mysql $mysqllogin -Bse "SHOW DATABASES"`;
|
||
|
|
foreach my $db (@dblist) {
|
||
|
|
chomp($db);
|
||
|
|
if ($db eq "information_schema") { 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] ] } `mysql $mysqllogin -Bse "SHOW TABLE STATUS FROM \\\`$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'} && $myvar{'have_isam'} eq "YES") {
|
||
|
|
badprint "ISAM is enabled but isn't being used\n";
|
||
|
|
push(@generalrec,"Add skip-isam to MySQL configuration to disable ISAM (MySQL > 4.1.0)");
|
||
|
|
}
|
||
|
|
# Fragmented tables
|
||
|
|
if ($fragtables > 0) {
|
||
|
|
badprint "Total fragmented tables: $fragtables\n";
|
||
|
|
push(@generalrec,"Run OPTIMIZE TABLE to defragment tables for better performance");
|
||
|
|
} else {
|
||
|
|
goodprint "Total fragmented tables: $fragtables\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
my %mycalc;
|
||
|
|
sub calculations {
|
||
|
|
if ($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
|
||
|
|
$mycalc{'max_used_memory'} = $mycalc{'server_buffers'} + $mycalc{"max_total_per_thread_buffers"};
|
||
|
|
$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);
|
||
|
|
|
||
|
|
# 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'} ;
|
||
|
|
|
||
|
|
# Key buffers
|
||
|
|
if (mysql_version_ge(4, 1)) {
|
||
|
|
$mycalc{'pct_key_buffer_used'} = sprintf("%.1f",(1 - (($mystat{'Key_blocks_unused'} * $myvar{'key_cache_block_size'}) / $myvar{'key_buffer_size'})) * 100);
|
||
|
|
}
|
||
|
|
if ($mystat{'Key_read_requests'} > 0) {
|
||
|
|
$mycalc{'pct_keys_from_mem'} = sprintf("%.1f",(100 - (($mystat{'Key_reads'} / $mystat{'Key_read_requests'}) * 100)));
|
||
|
|
} else {
|
||
|
|
$mycalc{'pct_keys_from_mem'} = 0;
|
||
|
|
}
|
||
|
|
if ($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'} = `mysql $mysqllogin -Bse "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'} + $mystat{'Created_tmp_disk_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'});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sub mysql_stats {
|
||
|
|
print "\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";
|
||
|
|
|
||
|
|
# Memory usage
|
||
|
|
infoprint "Total buffers: ".hr_bytes($mycalc{'server_buffers'})." global + ".hr_bytes($mycalc{'per_thread_buffers'})." per thread ($myvar{'max_connections'} max threads)\n";
|
||
|
|
if ($mycalc{'total_possible_used_memory'} > 2*1024*1024*1024 && $arch eq 32) {
|
||
|
|
badprint "Allocating > 2GB RAM on 32-bit systems can cause system instability\n";
|
||
|
|
badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
|
||
|
|
} elsif ($mycalc{'pct_physical_memory'} > 85) {
|
||
|
|
badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_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($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_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'}/$myvar{'max_connections'})\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
# Key buffer
|
||
|
|
if (!defined($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 "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 "Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
# No queries have run that would use keys
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Query cache
|
||
|
|
if (!mysql_version_ge(4)) {
|
||
|
|
# MySQL versions < 4.01 don't support query caching
|
||
|
|
push(@generalrec,"Upgrade MySQL to version 4+ to utilize query caching");
|
||
|
|
} elsif ($myvar{'query_cache_size'} < 1) {
|
||
|
|
badprint "Query cache is disabled\n";
|
||
|
|
push(@adjvars,"query_cache_size (>= 8M)");
|
||
|
|
} elsif ($mystat{'Com_select'} == 0) {
|
||
|
|
badprint "Query cache cannot be analyzed - no SELECT statements executed\n";
|
||
|
|
} else {
|
||
|
|
if ($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_disk_tables'} + $mystat{'Created_tmp_tables'})." total)\n";
|
||
|
|
push(@adjvars,"tmp_table_size (> ".hr_bytes_rnd($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) {
|
||
|
|
badprint "Temporary tables created on disk: $mycalc{'pct_temp_disk'}% (".hr_num($mystat{'Created_tmp_disk_tables'})." on disk / ".hr_num($mystat{'Created_tmp_disk_tables'} + $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_disk_tables'} + $mystat{'Created_tmp_tables'})." total)\n";
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
# For the sake of space, we will be quiet here
|
||
|
|
# No temporary tables have been created
|
||
|
|
}
|
||
|
|
|
||
|
|
# Thread cache
|
||
|
|
if ($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($mystat{'Connections'})." connections)\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Table cache
|
||
|
|
if ($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($mystat{'Opened_tables'})." opened)\n";
|
||
|
|
if (mysql_version_ge(5, 1)) {
|
||
|
|
push(@adjvars,"table_cache (> ".$myvar{'table_open_cache'}.")");
|
||
|
|
} else {
|
||
|
|
push(@adjvars,"table_cache (> ".$myvar{'table_cache'}.")");
|
||
|
|
}
|
||
|
|
push(@generalrec,"Increase table_cache gradually to avoid file descriptor limits");
|
||
|
|
} 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";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Performance options
|
||
|
|
if (!mysql_version_ge(4, 1)) {
|
||
|
|
push(@generalrec,"Upgrade to MySQL 4.1+ to use concurrent MyISAM inserts");
|
||
|
|
} 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");
|
||
|
|
}
|
||
|
|
|
||
|
|
# InnoDB
|
||
|
|
if (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES" && defined $enginestats{'InnoDB'}) {
|
||
|
|
if ($myvar{'innodb_buffer_pool_size'} > $enginestats{'InnoDB'}) {
|
||
|
|
goodprint "InnoDB data size / buffer pool: ".hr_bytes($enginestats{'InnoDB'})."/".hr_bytes($myvar{'innodb_buffer_pool_size'})."\n";
|
||
|
|
} else {
|
||
|
|
badprint "InnoDB data size / buffer pool: ".hr_bytes($enginestats{'InnoDB'})."/".hr_bytes($myvar{'innodb_buffer_pool_size'})."\n";
|
||
|
|
push(@adjvars,"innodb_buffer_pool_size (>= ".hr_bytes_rnd($enginestats{'InnoDB'}).")");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Take the two recommendation arrays and display them at the end of the output
|
||
|
|
sub make_recommendations {
|
||
|
|
print "\n-------- Recommendations -----------------------------------------------------\n";
|
||
|
|
if (@generalrec > 0) {
|
||
|
|
print "General recommendations:\n";
|
||
|
|
foreach (@generalrec) { print " ".$_."\n"; }
|
||
|
|
}
|
||
|
|
if (@adjvars > 0) {
|
||
|
|
print "Variables to adjust:\n";
|
||
|
|
if ($mycalc{'pct_physical_memory'} > 90) {
|
||
|
|
print " *** MySQL's maximum memory usage is dangerously high ***\n".
|
||
|
|
" *** Add RAM before increasing MySQL buffer variables ***\n";
|
||
|
|
}
|
||
|
|
foreach (@adjvars) { print " ".$_."\n"; }
|
||
|
|
}
|
||
|
|
if (@generalrec == 0 && @adjvars ==0) {
|
||
|
|
print "No additional performance recommendations are available.\n"
|
||
|
|
}
|
||
|
|
print "\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
# ---------------------------------------------------------------------------
|
||
|
|
# BEGIN 'MAIN'
|
||
|
|
# ---------------------------------------------------------------------------
|
||
|
|
print "\n >> 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";
|
||
|
|
mysql_setup; # Gotta login first
|
||
|
|
os_setup; # Set up some OS variables
|
||
|
|
get_all_vars; # Toss variables/status into hashes
|
||
|
|
validate_tuner_version; # Check current MySQLTuner version
|
||
|
|
validate_mysql_version; # Check current MySQL version
|
||
|
|
check_architecture; # Suggest 64-bit upgrade
|
||
|
|
check_storage_engines; # Show enabled storage engines
|
||
|
|
security_recommendations; # Display some security recommendations
|
||
|
|
calculations; # Calculate everything we need
|
||
|
|
mysql_stats; # Print the server stats
|
||
|
|
make_recommendations; # Make recommendations based on stats
|
||
|
|
# ---------------------------------------------------------------------------
|
||
|
|
# END 'MAIN'
|
||
|
|
# ---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
# Local variables:
|
||
|
|
# indent-tabs-mode: t
|
||
|
|
# cperl-indent-level: 8
|
||
|
|
# perl-indent-level: 8
|
||
|
|
# End:
|