#!/usr/bin/perl -w # mysqltuner.pl - Version 1.3.0 # High Performance MySQL Tuning Script # Copyright (C) 2006-2014 Major Hayden - major@mhtx.net # # For the latest updates, please visit http://mysqltuner.com/ # Git repository available at http://github.com/major/MySQLTuner-perl # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # # This project would not be possible without help from: # Matthew Montgomery Paul Kehrer Dave Burgess # Jonathan Hinds Mike Jackson Nils Breunese # Shawn Ashlee Luuk Vosslamber Ville Skytta # Trent Hornibrook Jason Gill Mark Imbriaco # Greg Eden Aubin Galinotti Giovanni Bechis # Bill Bradford Ryan Novosielski Michael Scheidell # Blair Christensen Hans du Plooy Victor Trac # Everett Barnes Tom Krouper Gary Barrueto # Simon Greenaway Adam Stein Isart Montane # Baptiste M. Cole Turner # # Inspired by Matthew Montgomery's tuning-primer.sh script: # http://forge.mysql.com/projects/view.php?id=44 # use strict; use warnings; use diagnostics; use File::Spec; use Getopt::Long; # Set up a few variables for use in the script my $tunerversion = "1.4.0"; my (@adjvars, @generalrec); # Set defaults my %opt = ( "nobad" => 0, "nogood" => 0, "noinfo" => 0, "nocolor" => 0, "forcemem" => 0, "forceswap" => 0, "host" => 0, "socket" => 0, "port" => 0, "user" => 0, "pass" => 0, "skipsize" => 0, "checkversion" => 0, "buffers" => 0, ); # Gather the options from the command line GetOptions(\%opt, 'nobad', 'nogood', 'noinfo', 'nocolor', 'forcemem=i', 'forceswap=i', 'host=s', 'socket=s', 'port=i', 'user=s', 'pass=s', 'skipsize', 'checkversion', 'mysqladmin=s', 'help', 'buffers', ); if (defined $opt{'help'} && $opt{'help'} == 1) { usage(); } sub usage { # Shown with --help option passed print "\n". " MySQLTuner $tunerversion - MySQL High Performance Tuning Script\n". " Bug reports, feature requests, and downloads at http://mysqltuner.com/\n". " Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL\n". "\n". " Important Usage Guidelines:\n". " To run the script with the default options, run the script without arguments\n". " Allow MySQL server to run for at least 24-48 hours before trusting suggestions\n". " Some routines may require root level privileges (script will provide warnings)\n". " You must provide the remote server's total memory when connecting to other servers\n". "\n". " Connection and Authentication\n". " --host Connect to a remote host to perform tests (default: localhost)\n". " --socket Use a different socket for a local connection\n". " --port Port to use for connection (default: 3306)\n". " --user Username to use for authentication\n". " --pass Password to use for authentication\n". " --mysqladmin Path to a custom mysqladmin executable\n". "\n". " Performance and Reporting Options\n". " --skipsize Don't enumerate tables and their types/sizes (default: on)\n". " (Recommended for servers with many tables)\n". " --checkversion Check for updates to MySQLTuner (default: don't check)\n". " --forcemem Amount of RAM installed in megabytes\n". " --forceswap Amount of swap memory configured in megabytes\n". "\n". " Output Options:\n". " --nogood Remove OK responses\n". " --nobad Remove negative/suggestion responses\n". " --noinfo Remove informational responses\n". " --nocolor Don't print output in color\n". " --buffers Print global and per-thread buffer values\n". "\n"; exit; } my $devnull = File::Spec->devnull(); # Setting up the colors for the print styles my $good = ($opt{nocolor} == 0)? "[\e[0;32mOK\e[0m]" : "[OK]" ; my $bad = ($opt{nocolor} == 0)? "[\e[0;31m!!\e[0m]" : "[!!]" ; my $info = ($opt{nocolor} == 0)? "[\e[0;34m--\e[0m]" : "[--]" ; # Functions that handle the print styles sub goodprint { print $good." ".$_[0] unless ($opt{nogood} == 1); } sub infoprint { print $info." ".$_[0] unless ($opt{noinfo} == 1); } sub badprint { print $bad." ".$_[0] unless ($opt{nobad} == 1); } sub redwrap { return ($opt{nocolor} == 0)? "\e[0;31m".$_[0]."\e[0m" : $_[0] ; } sub greenwrap { return ($opt{nocolor} == 0)? "\e[0;32m".$_[0]."\e[0m" : $_[0] ; } # Calculates the parameter passed in bytes, and then rounds it to one decimal place sub hr_bytes { my $num = shift; if ($num >= (1024**3)) { #GB return sprintf("%.1f",($num/(1024**3)))."G"; } elsif ($num >= (1024**2)) { #MB return sprintf("%.1f",($num/(1024**2)))."M"; } elsif ($num >= 1024) { #KB return sprintf("%.1f",($num/1024))."K"; } else { return $num."B"; } } # Calculates the parameter passed in bytes, and then rounds it to the nearest integer sub hr_bytes_rnd { my $num = shift; if ($num >= (1024**3)) { #GB return int(($num/(1024**3)))."G"; } elsif ($num >= (1024**2)) { #MB return int(($num/(1024**2)))."M"; } elsif ($num >= 1024) { #KB return int(($num/1024))."K"; } else { return $num."B"; } } # Calculates the parameter passed to the nearest power of 1000, then rounds it to the nearest integer sub hr_num { my $num = shift; if ($num >= (1000**3)) { # Billions return int(($num/(1000**3)))."B"; } elsif ($num >= (1000**2)) { # Millions return int(($num/(1000**2)))."M"; } elsif ($num >= 1000) { # Thousands return int(($num/1000))."K"; } else { return $num; } } # Calculates uptime to display in a more attractive form sub pretty_uptime { my $uptime = shift; my $seconds = $uptime % 60; my $minutes = int(($uptime % 3600) / 60); my $hours = int(($uptime % 86400) / (3600)); my $days = int($uptime / (86400)); my $uptimestring; if ($days > 0) { $uptimestring = "${days}d ${hours}h ${minutes}m ${seconds}s"; } elsif ($hours > 0) { $uptimestring = "${hours}h ${minutes}m ${seconds}s"; } elsif ($minutes > 0) { $uptimestring = "${minutes}m ${seconds}s"; } else { $uptimestring = "${seconds}s"; } return $uptimestring; } # Retrieves the memory installed on this machine my ($physical_memory,$swap_memory,$duflags); sub os_setup { sub memerror { badprint "Unable to determine total memory/swap; use '--forcemem' and '--forceswap'\n"; exit; } my $os = `uname`; $duflags = ($os =~ /Linux/) ? '-b' : ''; if ($opt{'forcemem'} > 0) { $physical_memory = $opt{'forcemem'} * 1048576; infoprint "Assuming $opt{'forcemem'} MB of physical memory\n"; if ($opt{'forceswap'} > 0) { $swap_memory = $opt{'forceswap'} * 1048576; infoprint "Assuming $opt{'forceswap'} MB of swap space\n"; } else { $swap_memory = 0; badprint "Assuming 0 MB of swap space (use --forceswap to specify)\n"; } } else { if ($os =~ /Linux/) { $physical_memory = `free -b | grep Mem | awk '{print \$2}'` or memerror; $swap_memory = `free -b | grep Swap | awk '{print \$2}'` or memerror; } elsif ($os =~ /Darwin/) { $physical_memory = `sysctl -n hw.memsize` or memerror; $swap_memory = `sysctl -n vm.swapusage | awk '{print \$3}' | sed 's/\..*\$//'` or memerror; } elsif ($os =~ /NetBSD|OpenBSD|FreeBSD/) { $physical_memory = `sysctl -n hw.physmem` or memerror; if ($physical_memory < 0) { $physical_memory = `sysctl -n hw.physmem64` or memerror; } $swap_memory = `swapctl -l | grep '^/' | awk '{ s+= \$2 } END { print s }'` or memerror; } elsif ($os =~ /BSD/) { $physical_memory = `sysctl -n hw.realmem` or memerror; $swap_memory = `swapinfo | grep '^/' | awk '{ s+= \$2 } END { print s }'`; } elsif ($os =~ /SunOS/) { $physical_memory = `/usr/sbin/prtconf | grep Memory | cut -f 3 -d ' '` or memerror; chomp($physical_memory); $physical_memory = $physical_memory*1024*1024; } elsif ($os =~ /AIX/) { $physical_memory = `lsattr -El sys0 | grep realmem | awk '{print \$2}'` or memerror; chomp($physical_memory); $physical_memory = $physical_memory*1024; $swap_memory = `lsps -as | awk -F"(MB| +)" '/MB /{print \$2}'` or memerror; chomp($swap_memory); $swap_memory = $swap_memory*1024*1024; } } chomp($physical_memory); } # Checks to see if a MySQL login is possible my ($mysqllogin,$doremote,$remotestring); sub mysql_setup { $doremote = 0; $remotestring = ''; my $mysqladmincmd; if ($opt{mysqladmin}) { $mysqladmincmd = $opt{mysqladmin}; } else { $mysqladmincmd = `which mysqladmin`; } chomp($mysqladmincmd); if (! -e $mysqladmincmd && $opt{mysqladmin}) { badprint "Unable to find the mysqladmin command you specified: ".$mysqladmincmd."\n"; exit; } elsif (! -e $mysqladmincmd) { badprint "Couldn't find mysqladmin in your \$PATH. Is MySQL installed?\n"; exit; } # Are we being asked to connect via a socket? if ($opt{socket} ne 0) { $remotestring = " -S $opt{socket}"; } # Are we being asked to connect to a remote server? if ($opt{host} ne 0) { chomp($opt{host}); $opt{port} = ($opt{port} eq 0)? 3306 : $opt{port} ; # If we're doing a remote connection, but forcemem wasn't specified, we need to exit if ($opt{'forcemem'} eq 0) { badprint "The --forcemem option is required for remote connections\n"; exit; } infoprint "Performing tests on $opt{host}:$opt{port}\n"; $remotestring = " -h $opt{host} -P $opt{port}"; $doremote = 1; } # Did we already get a username and password passed on the command line? if ($opt{user} ne 0 and $opt{pass} ne 0) { $mysqllogin = "-u $opt{user} -p'$opt{pass}'".$remotestring; my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`; if ($loginstatus =~ /mysqld is alive/) { goodprint "Logged in using credentials passed on the command line\n"; return 1; } else { badprint "Attempted to use login credentials, but they were invalid\n"; exit 0; } } my $svcprop = `which svcprop 2>/dev/null`; if (substr($svcprop, 0, 1) =~ "/") { # We are on solaris (my $mysql_login = `svcprop -p quickbackup/username svc:/network/mysql-quickbackup:default`) =~ s/\s+$//; (my $mysql_pass = `svcprop -p quickbackup/password svc:/network/mysql-quickbackup:default`) =~ s/\s+$//; if ( substr($mysql_login, 0, 7) ne "svcprop" ) { # mysql-quickbackup is installed $mysqllogin = "-u $mysql_login -p$mysql_pass"; my $loginstatus = `mysqladmin $mysqllogin ping 2>&1`; if ($loginstatus =~ /mysqld is alive/) { goodprint "Logged in using credentials from mysql-quickbackup.\n"; return 1; } else { badprint "Attempted to use login credentials from mysql-quickbackup, but they failed.\n"; exit 0; } } } elsif ( -r "/etc/psa/.psa.shadow" and $doremote == 0 ) { # It's a Plesk box, use the available credentials $mysqllogin = "-u admin -p`cat /etc/psa/.psa.shadow`"; my $loginstatus = `$mysqladmincmd ping $mysqllogin 2>&1`; unless ($loginstatus =~ /mysqld is alive/) { badprint "Attempted to use login credentials from Plesk, but they failed.\n"; exit 0; } } elsif ( -r "/usr/local/directadmin/conf/mysql.conf" and $doremote == 0 ){ # It's a DirectAdmin box, use the available credentials my $mysqluser=`cat /usr/local/directadmin/conf/mysql.conf | egrep '^user=.*'`; my $mysqlpass=`cat /usr/local/directadmin/conf/mysql.conf | egrep '^passwd=.*'`; $mysqluser =~ s/user=//; $mysqluser =~ s/[\r\n]//; $mysqlpass =~ s/passwd=//; $mysqlpass =~ s/[\r\n]//; $mysqllogin = "-u $mysqluser -p$mysqlpass"; my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`; unless ($loginstatus =~ /mysqld is alive/) { badprint "Attempted to use login credentials from DirectAdmin, but they failed.\n"; exit 0; } } elsif ( -r "/etc/mysql/debian.cnf" and $doremote == 0 ){ # We have a debian maintenance account, use it $mysqllogin = "--defaults-file=/etc/mysql/debian.cnf"; my $loginstatus = `$mysqladmincmd $mysqllogin ping 2>&1`; if ($loginstatus =~ /mysqld is alive/) { goodprint "Logged in using credentials from debian maintenance account.\n"; return 1; } else { badprint "Attempted to use login credentials from debian maintenance account, but they failed.\n"; exit 0; } } else { # It's not Plesk or debian, we should try a login my $loginstatus = `$mysqladmincmd $remotestring ping 2>&1`; if ($loginstatus =~ /mysqld is alive/) { # Login went just fine $mysqllogin = " $remotestring "; # Did this go well because of a .my.cnf file or is there no password set? my $userpath = `printenv HOME`; if (length($userpath) > 0) { chomp($userpath); } unless ( -e "${userpath}/.my.cnf" ) { badprint "Successfully authenticated with no password - SECURITY RISK!\n"; } return 1; } else { print STDERR "Please enter your MySQL administrative login: "; my $name = <>; print STDERR "Please enter your MySQL administrative password: "; system("stty -echo >$devnull 2>&1"); my $password = <>; system("stty echo >$devnull 2>&1"); chomp($password); chomp($name); $mysqllogin = "-u $name"; if (length($password) > 0) { $mysqllogin .= " -p'$password'"; } $mysqllogin .= $remotestring; my $loginstatus = `$mysqladmincmd 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 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"; } elsif (`uname` =~ /NetBSD|OpenBSD/ && `sysctl -b hw.machine` =~ /64/) { $arch = 64; goodprint "Operating on 64-bit architecture\n"; } elsif (`uname` =~ /FreeBSD/ && `sysctl -b hw.machine_arch` =~ /64/) { $arch = 64; goodprint "Operating on 64-bit architecture\n"; } elsif (`uname` =~ /Darwin/ && `uname -m` =~ /Power Macintosh/) { # Darwin box.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu1228.15.4~1/RELEASE_PPC Power Macintosh $arch = 64; goodprint "Operating on 64-bit architecture\n"; } elsif (`uname` =~ /Darwin/ && `uname -m` =~ /x86_64/) { # Darwin gibas.local 12.3.0 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\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; if (mysql_version_ge(5, 1)) { my @engineresults = `mysql $mysqllogin -Bse "SELECT ENGINE,SUPPORT FROM information_schema.ENGINES WHERE ENGINE NOT IN ('performance_schema','MyISAM','MERGE','MEMORY') ORDER BY ENGINE ASC"`; foreach my $line (@engineresults) { my ($engine,$engineenabled); ($engine,$engineenabled) = $line =~ /([a-zA-Z_]*)\s+([a-zA-Z]+)/; $engines .= ($engineenabled eq "YES" || $engineenabled eq "DEFAULT") ? greenwrap "+".$engine." " : redwrap "-".$engine." "; } } else { $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"; } # Auto increments my %tblist; # Find the maximum integer my $maxint = `mysql $mysqllogin -Bse "SELECT ~0"`; # 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(!$tblist{$db}) { $tblist{$db} = (); } if ($db eq "information_schema") { next; } my @ia = (0, 10); if (!mysql_version_ge(4, 1)) { # MySQL 3.23/4.0 keeps Data_Length in the 5th (0-based) column @ia = (0, 9); } push(@{$tblist{$db}}, map { [ (split)[@ia] ] } `mysql $mysqllogin -Bse "SHOW TABLE STATUS FROM \\\`$db\\\`"`); } my @dbnames = keys %tblist; foreach my $db (@dbnames) { foreach my $tbl (@{$tblist{$db}}) { my ($name, $autoincrement) = @$tbl; if ($autoincrement =~ /^\d+?$/) { my $percent = ($autoincrement / $maxint) * 100; if($percent >= 75) { badprint "Table '$db.$name' has an autoincrement value near max capacity ($percent%)\n"; } } } } } my %mycalc; sub calculations { if ($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) && $myvar{'key_buffer_size'} > 0) { $mycalc{'pct_key_buffer_used'} = sprintf("%.1f",(1 - (($mystat{'Key_blocks_unused'} * $myvar{'key_cache_block_size'}) / $myvar{'key_buffer_size'})) * 100); } else { $mycalc{'pct_key_buffer_used'} = 0; } if ($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'}) * 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 ($myvar{'max_connections'} max threads)\n"; if ($opt{buffers} ne 0) { infoprint "Global Buffers\n"; infoprint " +-- Key Buffer: " . hr_bytes($myvar{'key_buffer_size'}) . "\n"; infoprint " +-- Max Tmp Table: ".hr_bytes($mycalc{'max_tmp_table_size'})."\n"; if (defined $myvar{'innodb_buffer_pool_size'}) { infoprint " +-- InnoDB Buffer Pool: " . hr_bytes($myvar{'innodb_buffer_pool_size'}) . "\n"; } if (defined $myvar{'innodb_additional_mem_pool_size'}) { infoprint " +-- InnoDB Additional Mem Pool: " . hr_bytes($myvar{'innodb_additional_mem_pool_size'}) . "\n"; } if (defined $myvar{'innodb_log_buffer_size'}) { infoprint " +-- InnoDB Log Buffer: " . hr_bytes($myvar{'innodb_log_buffer_size'}) . "\n"; } if (defined $myvar{'query_cache_size'}) { infoprint " +-- Query Cache: " . hr_bytes($myvar{'query_cache_size'}) . "\n"; } infoprint "Per Thread Buffers\n"; infoprint " +-- Read Buffer: " . hr_bytes($myvar{'read_buffer_size'}) . "\n"; infoprint " +-- Read RND Buffer: " . hr_bytes($myvar{'read_rnd_buffer_size'}) . "\n"; infoprint " +-- Sort Buffer: " . hr_bytes($myvar{'sort_buffer_size'}) . "\n"; infoprint " +-- Thread stack: " . hr_bytes($myvar{'thread_stack'}) . "\n"; infoprint " +-- Join Buffer: " . hr_bytes($myvar{'join_buffer_size'}) . "\n"; } if ($arch && $arch == 32 && $mycalc{'total_possible_used_memory'} > 2*1024*1024*1024) { badprint "Allocating > 2GB RAM on 32-bit systems can cause system instability\n"; badprint "Maximum possible memory usage: ".hr_bytes($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 ($myvar{'query_cache_type'} eq "OFF") { badprint "Query cache is disabled\n"; push(@adjvars,"query_cache_type (=1)"); } elsif ($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($mystat{'Created_tmp_tables'})." total)\n"; push(@adjvars,"tmp_table_size (> ".hr_bytes_rnd($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_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($mystat{'Created_tmp_tables'})." total)\n"; } } else { # For the sake of space, we will be quiet here # No temporary tables have been created } # Thread cache if ($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 my $table_cache_var = ""; if ($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)) { $table_cache_var = "table_open_cache"; } else { $table_cache_var = "table_cache"; } push(@adjvars,$table_cache_var." (> ".$myvar{$table_cache_var}.")"); push(@generalrec,"Increase ".$table_cache_var." gradually to avoid file descriptor limits"); push(@generalrec,"Read this before increasing ".$table_cache_var." over 64: http://bit.ly/1mi7c4C"); } 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'} > $enginestats{'InnoDB'}) { goodprint "InnoDB buffer pool / data size: ".hr_bytes($myvar{'innodb_buffer_pool_size'})."/".hr_bytes($enginestats{'InnoDB'})."\n"; } else { badprint "InnoDB buffer pool / data size: ".hr_bytes($myvar{'innodb_buffer_pool_size'})."/".hr_bytes($enginestats{'InnoDB'})."\n"; push(@adjvars,"innodb_buffer_pool_size (>= ".hr_bytes_rnd($enginestats{'InnoDB'}).")"); } if (defined $mystat{'Innodb_log_waits'} && $mystat{'Innodb_log_waits'} > 0) { badprint "InnoDB log waits: ".$mystat{'Innodb_log_waits'}; push(@adjvars,"innodb_log_buffer_size (>= ".hr_bytes_rnd($myvar{'innodb_log_buffer_size'}).")"); } else { goodprint "InnoDB log waits: ".$mystat{'Innodb_log_waits'}; } } } # 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 \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_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: