tuner.pl

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  1. #!/usr/bin/perl -w
  2. # mysqltuner.pl - Version 1.2.0
  3. # High Performance MySQL Tuning Script
  4. # Copyright (C) 2006-2011 Major Hayden - major@mhtx.net
  5. #
  6. # For the latest updates, please visit http://mysqltuner.com/
  7. # Git repository available at http://github.com/rackerhacker/MySQLTuner-perl
  8. #
  9. # This program is free software: you can redistribute it and/or modify
  10. # it under the terms of the GNU General Public License as published by
  11. # the Free Software Foundation, either version 3 of the License, or
  12. # (at your option) any later version.
  13. #
  14. # This program is distributed in the hope that it will be useful,
  15. # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17. # GNU General Public License for more details.
  18. #
  19. # You should have received a copy of the GNU General Public License
  20. # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21. #
  22. # This project would not be possible without help from:
  23. #   Matthew Montgomery     Paul Kehrer          Dave Burgess
  24. #   Jonathan Hinds         Mike Jackson         Nils Breunese
  25. #   Shawn Ashlee           Luuk Vosslamber      Ville Skytta
  26. #   Trent Hornibrook       Jason Gill           Mark Imbriaco
  27. #   Greg Eden              Aubin Galinotti      Giovanni Bechis
  28. #   Bill Bradford          Ryan Novosielski     Michael Scheidell
  29. #   Blair Christensen      Hans du Plooy        Victor Trac
  30. #   Everett Barnes         Tom Krouper          Gary Barrueto
  31. #   Simon Greenaway        Adam Stein           Isart Montane
  32. #   Baptiste M.
  33. #
  34. # Inspired by Matthew Montgomery's tuning-primer.sh script:
  35. # http://forge.mysql.com/projects/view.php?id=44
  36. #
  37. use strict;
  38. use warnings;
  39. use diagnostics;
  40. use File::Spec;
  41. use Getopt::Long;
  42.  
  43. # Set up a few variables for use in the script
  44. my $tunerversion = "1.2.0";
  45. my (@adjvars, @generalrec);
  46.  
  47. # Set defaults
  48. my %opt = (
  49.                 "nobad"                 => 0,
  50.                 "nogood"                => 0,
  51.                 "noinfo"                => 0,
  52.                 "nocolor"               => 0,
  53.                 "forcemem"              => 0,
  54.                 "forceswap"     => 0,
  55.                 "host"                  => 0,
  56.                 "socket"                => 0,
  57.                 "port"                  => 0,
  58.                 "user"                  => 0,
  59.                 "pass"                  => 0,
  60.                 "skipsize"              => 0,
  61.                 "checkversion"  => 0,
  62.         );
  63.  
  64. # Gather the options from the command line
  65. GetOptions(\%opt,
  66.                 'nobad',
  67.                 'nogood',
  68.                 'noinfo',
  69.                 'nocolor',
  70.                 'forcemem=i',
  71.                 'forceswap=i',
  72.                 'host=s',
  73.                 'socket=s',
  74.                 'port=i',
  75.                 'user=s',
  76.                 'pass=s',
  77.                 'skipsize',
  78.                 'checkversion',
  79.                 'help',
  80.         );
  81.  
  82. if (defined $opt{'help'} && $opt{'help'} == 1) { usage(); }
  83.  
  84. sub usage {
  85.         # Shown with --help option passed
  86.         print "\n".
  87.                 "   MySQLTuner $tunerversion - MySQL High Performance Tuning Script\n".
  88.                 "   Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
  89.                 "   Maintained by Major Hayden (major\@mhtx.net) - Licensed under GPL\n".
  90.                 "\n".
  91.                 "   Important Usage Guidelines:\n".
  92.                 "      To run the script with the default options, run the script without arguments\n".
  93.                 "      Allow MySQL server to run for at least 24-48 hours before trusting suggestions\n".
  94.                 "      Some routines may require root level privileges (script will provide warnings)\n".
  95.                 "      You must provide the remote server's total memory when connecting to other servers\n".
  96.                 "\n".
  97.                 "   Connection and Authentication\n".
  98.                 "      --host <hostname>    Connect to a remote host to perform tests (default: localhost)\n".
  99.                 "      --socket <socket>    Use a different socket for a local connection\n".
  100.                 "      --port <port>        Port to use for connection (default: 3306)\n".
  101.                 "      --user <username>    Username to use for authentication\n".
  102.                 "      --pass <password>    Password to use for authentication\n".
  103.                 "\n".
  104.                 "   Performance and Reporting Options\n".
  105.                 "      --skipsize           Don't enumerate tables and their types/sizes (default: on)\n".
  106.                 "                             (Recommended for servers with many tables)\n".
  107.                 "      --checkversion       Check for updates to MySQLTuner (default: don't check)\n".
  108.                 "      --forcemem <size>    Amount of RAM installed in megabytes\n".
  109.                 "      --forceswap <size>   Amount of swap memory configured in megabytes\n".
  110.                 "\n".
  111.                 "   Output Options:\n".
  112.                 "      --nogood             Remove OK responses\n".
  113.                 "      --nobad              Remove negative/suggestion responses\n".
  114.                 "      --noinfo             Remove informational responses\n".
  115.                 "      --nocolor            Don't print output in color\n".
  116.                 "\n";
  117.         exit;
  118. }
  119.  
  120. my $devnull = File::Spec->devnull();
  121.  
  122. # Setting up the colors for the print styles
  123. my $good = ($opt{nocolor} == 0)? "[\e[0;32mOK\e[0m]" : "[OK]" ;
  124. my $bad = ($opt{nocolor} == 0)? "[\e[0;31m!!\e[0m]" : "[!!]" ;
  125. my $info = ($opt{nocolor} == 0)? "[\e[0;34m--\e[0m]" : "[--]" ;
  126.  
  127. # Functions that handle the print styles
  128. sub goodprint { print $good." ".$_[0] unless ($opt{nogood} == 1); }
  129. sub infoprint { print $info." ".$_[0] unless ($opt{noinfo} == 1); }
  130. sub badprint { print $bad." ".$_[0] unless ($opt{nobad} == 1); }
  131. sub redwrap { return ($opt{nocolor} == 0)? "\e[0;31m".$_[0]."\e[0m" : $_[0] ; }
  132. sub greenwrap { return ($opt{nocolor} == 0)? "\e[0;32m".$_[0]."\e[0m" : $_[0] ; }
  133.  
  134. # Calculates the parameter passed in bytes, and then rounds it to one decimal place
  135. sub hr_bytes {
  136.         my $num = shift;
  137.         if ($num >= (1024**3)) { #GB
  138.                 return sprintf("%.1f",($num/(1024**3)))."G";
  139.         } elsif ($num >= (1024**2)) { #MB
  140.                 return sprintf("%.1f",($num/(1024**2)))."M";
  141.         } elsif ($num >= 1024) { #KB
  142.                 return sprintf("%.1f",($num/1024))."K";
  143.         } else {
  144.                 return $num."B";
  145.         }
  146. }
  147.  
  148. # Calculates the parameter passed in bytes, and then rounds it to the nearest integer
  149. sub hr_bytes_rnd {
  150.         my $num = shift;
  151.         if ($num >= (1024**3)) { #GB
  152.                 return int(($num/(1024**3)))."G";
  153.         } elsif ($num >= (1024**2)) { #MB
  154.                 return int(($num/(1024**2)))."M";
  155.         } elsif ($num >= 1024) { #KB
  156.                 return int(($num/1024))."K";
  157.         } else {
  158.                 return $num."B";
  159.         }
  160. }
  161.  
  162. # Calculates the parameter passed to the nearest power of 1000, then rounds it to the nearest integer
  163. sub hr_num {
  164.         my $num = shift;
  165.         if ($num >= (1000**3)) { # Billions
  166.                 return int(($num/(1000**3)))."B";
  167.         } elsif ($num >= (1000**2)) { # Millions
  168.                 return int(($num/(1000**2)))."M";
  169.         } elsif ($num >= 1000) { # Thousands
  170.                 return int(($num/1000))."K";
  171.         } else {
  172.                 return $num;
  173.         }
  174. }
  175.  
  176. # Calculates uptime to display in a more attractive form
  177. sub pretty_uptime {
  178.         my $uptime = shift;
  179.         my $seconds = $uptime % 60;
  180.         my $minutes = int(($uptime % 3600) / 60);
  181.         my $hours = int(($uptime % 86400) / (3600));
  182.         my $days = int($uptime / (86400));
  183.         my $uptimestring;
  184.         if ($days > 0) {
  185.                 $uptimestring = "${days}d ${hours}h ${minutes}m ${seconds}s";
  186.         } elsif ($hours > 0) {
  187.                 $uptimestring = "${hours}h ${minutes}m ${seconds}s";
  188.         } elsif ($minutes > 0) {
  189.                 $uptimestring = "${minutes}m ${seconds}s";
  190.         } else {
  191.                 $uptimestring = "${seconds}s";
  192.         }
  193.         return $uptimestring;
  194. }
  195.  
  196. # Retrieves the memory installed on this machine
  197. my ($physical_memory,$swap_memory,$duflags);
  198. sub os_setup {
  199.         sub memerror {
  200.                 badprint "Unable to determine total memory/swap; use '--forcemem' and '--forceswap'\n";
  201.                 exit;
  202.         }
  203.         my $os = `uname`;
  204.         $duflags = ($os =~ /Linux/) ? '-b' : '';
  205.         if ($opt{'forcemem'} > 0) {
  206.                 $physical_memory = $opt{'forcemem'} * 1048576;
  207.                 infoprint "Assuming $opt{'forcemem'} MB of physical memory\n";
  208.                 if ($opt{'forceswap'} > 0) {
  209.                         $swap_memory = $opt{'forceswap'} * 1048576;
  210.                         infoprint "Assuming $opt{'forceswap'} MB of swap space\n";
  211.                 } else {
  212.                         $swap_memory = 0;
  213.                         badprint "Assuming 0 MB of swap space (use --forceswap to specify)\n";
  214.                 }
  215.         } else {
  216.                 if ($os =~ /Linux/) {
  217.                         $physical_memory = `free -b | grep Mem | awk '{print \$2}'` or memerror;
  218.                         $swap_memory = `free -b | grep Swap | awk '{print \$2}'` or memerror;
  219.                 } elsif ($os =~ /Darwin/) {
  220.                         $physical_memory = `sysctl -n hw.memsize` or memerror;
  221.                         $swap_memory = `sysctl -n vm.swapusage | awk '{print \$3}' | sed 's/\..*\$//'` or memerror;
  222.                 } elsif ($os =~ /NetBSD|OpenBSD/) {
  223.                         $physical_memory = `sysctl -n hw.physmem` or memerror;
  224.                         if ($physical_memory < 0) {
  225.                                 $physical_memory = `sysctl -n hw.physmem64` or memerror;
  226.                         }
  227.                         $swap_memory = `swapctl -l | grep '^/' | awk '{ s+= \$2 } END { print s }'` or memerror;
  228.                 } elsif ($os =~ /BSD/) {
  229.                         $physical_memory = `sysctl -n hw.realmem`;
  230.                         $swap_memory = `swapinfo | grep '^/' | awk '{ s+= \$2 } END { print s }'`;
  231.                 } elsif ($os =~ /SunOS/) {
  232.                         $physical_memory = `/usr/sbin/prtconf | grep Memory | cut -f 3 -d ' '` or memerror;
  233.                         chomp($physical_memory);
  234.                         $physical_memory = $physical_memory*1024*1024;
  235.                 } elsif ($os =~ /AIX/) {
  236.                         $physical_memory = `lsattr -El sys0 | grep realmem | awk '{print \$2}'` or memerror;
  237.                         chomp($physical_memory);
  238.                         $physical_memory = $physical_memory*1024;
  239.                         $swap_memory = `lsps -as | awk -F"(MB| +)" '/MB /{print \$2}'` or memerror;
  240.                         chomp($swap_memory);
  241.                         $swap_memory = $swap_memory*1024*1024;
  242.                 }
  243.         }
  244.         chomp($physical_memory);
  245. }
  246.  
  247. # Checks to see if a MySQL login is possible
  248. my ($mysqllogin,$doremote,$remotestring);
  249. sub mysql_setup {
  250.         $doremote = 0;
  251.         $remotestring = '';
  252.         my $command = `which mysqladmin`;
  253.         chomp($command);
  254.         if (! -e $command) {
  255.                 badprint "Unable to find mysqladmin in your \$PATH.  Is MySQL installed?\n";
  256.                 exit;
  257.         }
  258.         # Are we being asked to connect via a socket?
  259.         if ($opt{socket} ne 0) {
  260.                 $remotestring = " -S $opt{socket}";
  261.         }
  262.         # Are we being asked to connect to a remote server?
  263.         if ($opt{host} ne 0) {
  264.                 chomp($opt{host});
  265.                 $opt{port} = ($opt{port} eq 0)? 3306 : $opt{port} ;
  266.                 # If we're doing a remote connection, but forcemem wasn't specified, we need to exit
  267.                 if ($opt{'forcemem'} eq 0) {
  268.                         badprint "The --forcemem option is required for remote connections\n";
  269.                         exit;
  270.                 }
  271.                 infoprint "Performing tests on $opt{host}:$opt{port}\n";
  272.                 $remotestring = " -h $opt{host} -P $opt{port}";
  273.                 $doremote = 1;
  274.         }
  275.         # Did we already get a username and password passed on the command line?
  276.         if ($opt{user} ne 0 and $opt{pass} ne 0) {
  277.                 $mysqllogin = "-u $opt{user} -p'$opt{pass}'".$remotestring;
  278.                 my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
  279.                 if ($loginstatus =~ /mysqld is alive/) {
  280.                         goodprint "Logged in using credentials passed on the command line\n";
  281.                         return 1;
  282.                 } else {
  283.                         badprint "Attempted to use login credentials, but they were invalid\n";
  284.                         exit 0;
  285.                 }
  286.         }
  287.         if ( -r "/etc/psa/.psa.shadow" and $doremote == 0 ) {
  288.                 # It's a Plesk box, use the available credentials
  289.                 $mysqllogin = "-u admin -p`cat /etc/psa/.psa.shadow`";
  290.                 my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
  291.                 unless ($loginstatus =~ /mysqld is alive/) {
  292.                         badprint "Attempted to use login credentials from Plesk, but they failed.\n";
  293.                         exit 0;
  294.                 }
  295.         } elsif ( -r "/etc/mysql/debian.cnf" and $doremote == 0 ){
  296.                 # We have a debian maintenance account, use it
  297.                 $mysqllogin = "--defaults-file=/etc/mysql/debian.cnf";
  298.                 my $loginstatus = `mysqladmin $mysqllogin ping 2>&1`;
  299.                 if ($loginstatus =~ /mysqld is alive/) {
  300.                         goodprint "Logged in using credentials from debian maintenance account.\n";
  301.                         return 1;
  302.                 } else {
  303.                         badprint "Attempted to use login credentials from debian maintenance account, but they failed.\n";
  304.                         exit 0;
  305.                 }
  306.         } else {
  307.                 # It's not Plesk or debian, we should try a login
  308.                 my $loginstatus = `mysqladmin $remotestring ping 2>&1`;
  309.                 if ($loginstatus =~ /mysqld is alive/) {
  310.                         # Login went just fine
  311.                         $mysqllogin = " $remotestring ";
  312.                         # Did this go well because of a .my.cnf file or is there no password set?
  313.                         my $userpath = `printenv HOME`;
  314.                         if (length($userpath) > 0) {
  315.                                 chomp($userpath);
  316.                         }
  317.                         unless ( -e "${userpath}/.my.cnf" ) {
  318.                                 badprint "Successfully authenticated with no password - SECURITY RISK!\n";
  319.                         }
  320.                         return 1;
  321.                 } else {
  322.                         print STDERR "Please enter your MySQL administrative login: ";
  323.                         my $name = <>;
  324.                         print STDERR "Please enter your MySQL administrative password: ";
  325.                         system("stty -echo >$devnull 2>&1");
  326.                         my $password = <>;
  327.                         system("stty echo >$devnull 2>&1");
  328.                         chomp($password);
  329.                         chomp($name);
  330.                         $mysqllogin = "-u $name";
  331.                         if (length($password) > 0) {
  332.                                 $mysqllogin .= " -p'$password'";
  333.                         }
  334.                         $mysqllogin .= $remotestring;
  335.                         my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
  336.                         if ($loginstatus =~ /mysqld is alive/) {
  337.                                 print STDERR "\n";
  338.                                 if (! length($password)) {
  339.                                         # Did this go well because of a .my.cnf file or is there no password set?
  340.                                         my $userpath = `ls -d ~`;
  341.                                         chomp($userpath);
  342.                                         unless ( -e "$userpath/.my.cnf" ) {
  343.                                                 badprint "Successfully authenticated with no password - SECURITY RISK!\n";
  344.                                         }
  345.                                 }
  346.                                 return 1;
  347.                         } else {
  348.                                 print "\n".$bad." Attempted to use login credentials, but they were invalid.\n";
  349.                                 exit 0;
  350.                         }
  351.                         exit 0;
  352.                 }
  353.         }
  354. }
  355.  
  356. # Populates all of the variable and status hashes
  357. my (%mystat,%myvar,$dummyselect);
  358. sub get_all_vars {
  359.         # We need to initiate at least one query so that our data is useable
  360.         $dummyselect = `mysql $mysqllogin -Bse "SELECT VERSION();"`;
  361.         my @mysqlvarlist = `mysql $mysqllogin -Bse "SHOW /*!50000 GLOBAL */ VARIABLES;"`;
  362.         foreach my $line (@mysqlvarlist) {
  363.                 $line =~ /([a-zA-Z_]*)\s*(.*)/;
  364.                 $myvar{$1} = $2;
  365.         }
  366.         my @mysqlstatlist = `mysql $mysqllogin -Bse "SHOW /*!50000 GLOBAL */ STATUS;"`;
  367.         foreach my $line (@mysqlstatlist) {
  368.                 $line =~ /([a-zA-Z_]*)\s*(.*)/;
  369.                 $mystat{$1} = $2;
  370.         }
  371.         # Workaround for MySQL bug #59393 wrt. ignore-builtin-innodb
  372.         if (($myvar{'ignore_builtin_innodb'} || "") eq "ON") {
  373.                 $myvar{'have_innodb'} = "NO";
  374.         }
  375.         # have_* for engines is deprecated and will be removed in MySQL 5.6;
  376.         # check SHOW ENGINES and set corresponding old style variables.
  377.         # Also works around MySQL bug #59393 wrt. skip-innodb
  378.         my @mysqlenginelist = `mysql $mysqllogin -Bse "SHOW ENGINES;" 2>$devnull`;
  379.         foreach my $line (@mysqlenginelist) {
  380.                 if ($line =~ /^([a-zA-Z_]+)\s+(\S+)/) {
  381.                         my $engine = lc($1);
  382.                         if ($engine eq "federated" || $engine eq "blackhole") {
  383.                                 $engine .= "_engine";
  384.                         } elsif ($engine eq "berkeleydb") {
  385.                                 $engine = "bdb";
  386.                         }
  387.                         my $val = ($2 eq "DEFAULT") ? "YES" : $2;
  388.                         $myvar{"have_$engine"} = $val;
  389.                 }
  390.         }
  391. }
  392.  
  393. sub security_recommendations {
  394.         print "\n-------- Security Recommendations  -------------------------------------------\n";
  395.         my @mysqlstatlist = `mysql $mysqllogin -Bse "SELECT CONCAT(user, '\@', host) FROM mysql.user WHERE password = '' OR password IS NULL;"`;
  396.         if (@mysqlstatlist) {
  397.                 foreach my $line (sort @mysqlstatlist) {
  398.                         chomp($line);
  399.                         badprint "User '".$line."' has no password set.\n";
  400.                 }
  401.         } else {
  402.                 goodprint "All database users have passwords assigned\n";
  403.         }
  404. }
  405.  
  406. sub get_replication_status {
  407.         my $slave_status = `mysql $mysqllogin -Bse "show slave status\\G"`;
  408.         my ($io_running) = ($slave_status =~ /slave_io_running\S*\s+(\S+)/i);
  409.         my ($sql_running) = ($slave_status =~ /slave_sql_running\S*\s+(\S+)/i);
  410.         if ($io_running eq 'Yes' && $sql_running eq 'Yes') {
  411.                 if ($myvar{'read_only'} eq 'OFF') {
  412.                         badprint "This replication slave is running with the read_only option disabled.";
  413.                 } else {
  414.                         goodprint "This replication slave is running with the read_only option enabled.";
  415.                 }
  416.         }
  417. }
  418.  
  419. # Checks for updates to MySQLTuner
  420. sub validate_tuner_version {
  421.         print "\n-------- General Statistics --------------------------------------------------\n";
  422.         if ($opt{checkversion} eq 0) {
  423.                 infoprint "Skipped version check for MySQLTuner script\n";
  424.                 return;
  425.         }
  426.         my $update;
  427.         my $url = "http://mysqltuner.com/versioncheck.php?v=$tunerversion";
  428.         if (-e "/usr/bin/curl") {
  429.                 $update = `/usr/bin/curl --connect-timeout 5 '$url' 2>$devnull`;
  430.                 chomp($update);
  431.         } elsif (-e "/usr/bin/wget") {
  432.                 $update = `/usr/bin/wget -e timestamping=off -T 5 -O - '$url' 2>$devnull`;
  433.                 chomp($update);
  434.         }
  435.         if ($update eq 1) {
  436.                 badprint "There is a new version of MySQLTuner available\n";
  437.         } elsif ($update eq 0) {
  438.                 goodprint "You have the latest version of MySQLTuner\n";
  439.         } else {
  440.                 infoprint "Unable to check for the latest MySQLTuner version\n";
  441.         }
  442. }
  443.  
  444. # Checks for supported or EOL'ed MySQL versions
  445. my ($mysqlvermajor,$mysqlverminor);
  446. sub validate_mysql_version {
  447.         ($mysqlvermajor,$mysqlverminor) = $myvar{'version'} =~ /(\d)\.(\d)/;
  448.         if (!mysql_version_ge(5)) {
  449.                 badprint "Your MySQL version ".$myvar{'version'}." is EOL software!  Upgrade soon!\n";
  450.         } elsif (mysql_version_ge(6)) {
  451.                 badprint "Currently running unsupported MySQL version ".$myvar{'version'}."\n";
  452.         } else {
  453.                 goodprint "Currently running supported MySQL version ".$myvar{'version'}."\n";
  454.         }
  455. }
  456.  
  457. # Checks if MySQL version is greater than equal to (major, minor)
  458. sub mysql_version_ge {
  459.         my ($maj, $min) = @_;
  460.         return $mysqlvermajor > $maj || ($mysqlvermajor == $maj && $mysqlverminor >= ($min || 0));
  461. }
  462.  
  463. # Checks for 32-bit boxes with more than 2GB of RAM
  464. my ($arch);
  465. sub check_architecture {
  466.         if ($doremote eq 1) { return; }
  467.         if (`uname` =~ /SunOS/ && `isainfo -b` =~ /64/) {
  468.                 $arch = 64;
  469.                 goodprint "Operating on 64-bit architecture\n";
  470.         } elsif (`uname` !~ /SunOS/ && `uname -m` =~ /64/) {
  471.                 $arch = 64;
  472.                 goodprint "Operating on 64-bit architecture\n";
  473.         } elsif (`uname` =~ /AIX/ && `bootinfo -K` =~ /64/) {
  474.                 $arch = 64;
  475.                 goodprint "Operating on 64-bit architecture\n";
  476.         } else {
  477.                 $arch = 32;
  478.                 if ($physical_memory > 2147483648) {
  479.                         badprint "Switch to 64-bit OS - MySQL cannot currently use all of your RAM\n";
  480.                 } else {
  481.                         goodprint "Operating on 32-bit architecture with less than 2GB RAM\n";
  482.                 }
  483.         }
  484. }
  485.  
  486. # Start up a ton of storage engine counts/statistics
  487. my (%enginestats,%enginecount,$fragtables);
  488. sub check_storage_engines {
  489.         if ($opt{skipsize} eq 1) {
  490.                 print "\n-------- Storage Engine Statistics -------------------------------------------\n";
  491.                 infoprint "Skipped due to --skipsize option\n";
  492.                 return;
  493.         }
  494.         print "\n-------- Storage Engine Statistics -------------------------------------------\n";
  495.         infoprint "Status: ";
  496.         my $engines;
  497.         $engines .= (defined $myvar{'have_archive'} && $myvar{'have_archive'} eq "YES")? greenwrap "+Archive " : redwrap "-Archive " ;
  498.         $engines .= (defined $myvar{'have_bdb'} && $myvar{'have_bdb'} eq "YES")? greenwrap "+BDB " : redwrap "-BDB " ;
  499.         $engines .= (defined $myvar{'have_federated_engine'} && $myvar{'have_federated_engine'} eq "YES")? greenwrap "+Federated " : redwrap "-Federated " ;
  500.         $engines .= (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES")? greenwrap "+InnoDB " : redwrap "-InnoDB " ;
  501.         $engines .= (defined $myvar{'have_isam'} && $myvar{'have_isam'} eq "YES")? greenwrap "+ISAM " : redwrap "-ISAM " ;
  502.         $engines .= (defined $myvar{'have_ndbcluster'} && $myvar{'have_ndbcluster'} eq "YES")? greenwrap "+NDBCluster " : redwrap "-NDBCluster " ;
  503.         print "$engines\n";
  504.         if (mysql_version_ge(5)) {
  505.                 # MySQL 5 servers can have table sizes calculated quickly from information schema
  506.                 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;"`;
  507.                 foreach my $line (@templist) {
  508.                         my ($engine,$size,$count);
  509.                         ($engine,$size,$count) = $line =~ /([a-zA-Z_]*)\s+(\d+)\s+(\d+)/;
  510.                         if (!defined($size)) { next; }
  511.                         $enginestats{$engine} = $size;
  512.                         $enginecount{$engine} = $count;
  513.                 }
  514.                 $fragtables = `mysql $mysqllogin -Bse "SELECT COUNT(TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema','mysql') AND Data_free > 0 AND NOT ENGINE='MEMORY';"`;
  515.                 chomp($fragtables);
  516.         } else {
  517.                 # MySQL < 5 servers take a lot of work to get table sizes
  518.                 my @tblist;
  519.                 # Now we build a database list, and loop through it to get storage engine stats for tables
  520.                 my @dblist = `mysql $mysqllogin -Bse "SHOW DATABASES"`;
  521.                 foreach my $db (@dblist) {
  522.                         chomp($db);
  523.                         if ($db eq "information_schema") { next; }
  524.                         my @ixs = (1, 6, 9);
  525.                         if (!mysql_version_ge(4, 1)) {
  526.                                 # MySQL 3.23/4.0 keeps Data_Length in the 5th (0-based) column
  527.                                 @ixs = (1, 5, 8);
  528.                         }
  529.                         push(@tblist, map { [ (split)[@ixs] ] } `mysql $mysqllogin -Bse "SHOW TABLE STATUS FROM \\\`$db\\\`"`);
  530.                 }
  531.                 # Parse through the table list to generate storage engine counts/statistics
  532.                 $fragtables = 0;
  533.                 foreach my $tbl (@tblist) {
  534.                         my ($engine, $size, $datafree) = @$tbl;
  535.                         if (defined $enginestats{$engine}) {
  536.                                 $enginestats{$engine} += $size;
  537.                                 $enginecount{$engine} += 1;
  538.                         } else {
  539.                                 $enginestats{$engine} = $size;
  540.                                 $enginecount{$engine} = 1;
  541.                         }
  542.                         if ($datafree > 0) {
  543.                                 $fragtables++;
  544.                         }
  545.                 }
  546.         }
  547.         while (my ($engine,$size) = each(%enginestats)) {
  548.                 infoprint "Data in $engine tables: ".hr_bytes_rnd($size)." (Tables: ".$enginecount{$engine}.")"."\n";
  549.         }
  550.         # If the storage engine isn't being used, recommend it to be disabled
  551.         if (!defined $enginestats{'InnoDB'} && defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES") {
  552.                 badprint "InnoDB is enabled but isn't being used\n";
  553.                 push(@generalrec,"Add skip-innodb to MySQL configuration to disable InnoDB");
  554.         }
  555.         if (!defined $enginestats{'BerkeleyDB'} && defined $myvar{'have_bdb'} && $myvar{'have_bdb'} eq "YES") {
  556.                 badprint "BDB is enabled but isn't being used\n";
  557.                 push(@generalrec,"Add skip-bdb to MySQL configuration to disable BDB");
  558.         }
  559.         if (!defined $enginestats{'ISAM'} && defined $myvar{'have_isam'} && $myvar{'have_isam'} eq "YES") {
  560.                 badprint "ISAM is enabled but isn't being used\n";
  561.                 push(@generalrec,"Add skip-isam to MySQL configuration to disable ISAM (MySQL > 4.1.0)");
  562.         }
  563.         # Fragmented tables
  564.         if ($fragtables > 0) {
  565.                 badprint "Total fragmented tables: $fragtables\n";
  566.                 push(@generalrec,"Run OPTIMIZE TABLE to defragment tables for better performance");
  567.         } else {
  568.                 goodprint "Total fragmented tables: $fragtables\n";
  569.         }
  570. }
  571.  
  572. my %mycalc;
  573. sub calculations {
  574.         if ($mystat{'Questions'} < 1) {
  575.                 badprint "Your server has not answered any queries - cannot continue...";
  576.                 exit 0;
  577.         }
  578.         # Per-thread memory
  579.         if (mysql_version_ge(4)) {
  580.                 $mycalc{'per_thread_buffers'} = $myvar{'read_buffer_size'} + $myvar{'read_rnd_buffer_size'} + $myvar{'sort_buffer_size'} + $myvar{'thread_stack'} + $myvar{'join_buffer_size'};
  581.         } else {
  582.                 $mycalc{'per_thread_buffers'} = $myvar{'record_buffer'} + $myvar{'record_rnd_buffer'} + $myvar{'sort_buffer'} + $myvar{'thread_stack'} + $myvar{'join_buffer_size'};
  583.         }
  584.         $mycalc{'total_per_thread_buffers'} = $mycalc{'per_thread_buffers'} * $myvar{'max_connections'};
  585.         $mycalc{'max_total_per_thread_buffers'} = $mycalc{'per_thread_buffers'} * $mystat{'Max_used_connections'};
  586.  
  587.         # Server-wide memory
  588.         $mycalc{'max_tmp_table_size'} = ($myvar{'tmp_table_size'} > $myvar{'max_heap_table_size'}) ? $myvar{'max_heap_table_size'} : $myvar{'tmp_table_size'} ;
  589.         $mycalc{'server_buffers'} = $myvar{'key_buffer_size'} + $mycalc{'max_tmp_table_size'};
  590.         $mycalc{'server_buffers'} += (defined $myvar{'innodb_buffer_pool_size'}) ? $myvar{'innodb_buffer_pool_size'} : 0 ;
  591.         $mycalc{'server_buffers'} += (defined $myvar{'innodb_additional_mem_pool_size'}) ? $myvar{'innodb_additional_mem_pool_size'} : 0 ;
  592.         $mycalc{'server_buffers'} += (defined $myvar{'innodb_log_buffer_size'}) ? $myvar{'innodb_log_buffer_size'} : 0 ;
  593.         $mycalc{'server_buffers'} += (defined $myvar{'query_cache_size'}) ? $myvar{'query_cache_size'} : 0 ;
  594.  
  595.         # Global memory
  596.         $mycalc{'max_used_memory'} = $mycalc{'server_buffers'} + $mycalc{"max_total_per_thread_buffers"};
  597.         $mycalc{'total_possible_used_memory'} = $mycalc{'server_buffers'} + $mycalc{'total_per_thread_buffers'};
  598.         $mycalc{'pct_physical_memory'} = int(($mycalc{'total_possible_used_memory'} * 100) / $physical_memory);
  599.  
  600.         # Slow queries
  601.         $mycalc{'pct_slow_queries'} = int(($mystat{'Slow_queries'}/$mystat{'Questions'}) * 100);
  602.  
  603.         # Connections
  604.         $mycalc{'pct_connections_used'} = int(($mystat{'Max_used_connections'}/$myvar{'max_connections'}) * 100);
  605.         $mycalc{'pct_connections_used'} = ($mycalc{'pct_connections_used'} > 100) ? 100 : $mycalc{'pct_connections_used'} ;
  606.  
  607.         # Key buffers
  608.         if (mysql_version_ge(4, 1)) {
  609.                 $mycalc{'pct_key_buffer_used'} = sprintf("%.1f",(1 - (($mystat{'Key_blocks_unused'} * $myvar{'key_cache_block_size'}) / $myvar{'key_buffer_size'})) * 100);
  610.         }
  611.         if ($mystat{'Key_read_requests'} > 0) {
  612.                 $mycalc{'pct_keys_from_mem'} = sprintf("%.1f",(100 - (($mystat{'Key_reads'} / $mystat{'Key_read_requests'}) * 100)));
  613.         } else {
  614.             $mycalc{'pct_keys_from_mem'} = 0;
  615.         }
  616.         if ($doremote eq 0 and !mysql_version_ge(5)) {
  617.                 my $size = 0;
  618.                 $size += (split)[0] for `find $myvar{'datadir'} -name "*.MYI" 2>&1 | xargs du -L $duflags 2>&1`;
  619.                 $mycalc{'total_myisam_indexes'} = $size;
  620.         } elsif (mysql_version_ge(5)) {
  621.                 $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';"`;
  622.         }
  623.         if (defined $mycalc{'total_myisam_indexes'} and $mycalc{'total_myisam_indexes'} == 0) {
  624.                 $mycalc{'total_myisam_indexes'} = "fail";
  625.         } elsif (defined $mycalc{'total_myisam_indexes'}) {
  626.                 chomp($mycalc{'total_myisam_indexes'});
  627.         }
  628.  
  629.         # Query cache
  630.         if (mysql_version_ge(4)) {
  631.                 $mycalc{'query_cache_efficiency'} = sprintf("%.1f",($mystat{'Qcache_hits'} / ($mystat{'Com_select'} + $mystat{'Qcache_hits'})) * 100);
  632.                 if ($myvar{'query_cache_size'}) {
  633.                         $mycalc{'pct_query_cache_used'} = sprintf("%.1f",100 - ($mystat{'Qcache_free_memory'} / $myvar{'query_cache_size'}) * 100);
  634.                 }
  635.         if ($mystat{'Qcache_lowmem_prunes'} == 0) {
  636.                         $mycalc{'query_cache_prunes_per_day'} = 0;
  637.                 } else {
  638.                         $mycalc{'query_cache_prunes_per_day'} = int($mystat{'Qcache_lowmem_prunes'} / ($mystat{'Uptime'}/86400));
  639.                 }
  640.         }
  641.  
  642.         # Sorting
  643.         $mycalc{'total_sorts'} = $mystat{'Sort_scan'} + $mystat{'Sort_range'};
  644.         if ($mycalc{'total_sorts'} > 0) {
  645.                 $mycalc{'pct_temp_sort_table'} = int(($mystat{'Sort_merge_passes'} / $mycalc{'total_sorts'}) * 100);
  646.         }
  647.  
  648.         # Joins
  649.         $mycalc{'joins_without_indexes'} = $mystat{'Select_range_check'} + $mystat{'Select_full_join'};
  650.         $mycalc{'joins_without_indexes_per_day'} = int($mycalc{'joins_without_indexes'} / ($mystat{'Uptime'}/86400));
  651.  
  652.         # Temporary tables
  653.         if ($mystat{'Created_tmp_tables'} > 0) {
  654.                 if ($mystat{'Created_tmp_disk_tables'} > 0) {
  655.                         $mycalc{'pct_temp_disk'} = int(($mystat{'Created_tmp_disk_tables'} / ($mystat{'Created_tmp_tables'} + $mystat{'Created_tmp_disk_tables'})) * 100);
  656.                 } else {
  657.                         $mycalc{'pct_temp_disk'} = 0;
  658.                 }
  659.         }
  660.  
  661.         # Table cache
  662.         if ($mystat{'Opened_tables'} > 0) {
  663.                 $mycalc{'table_cache_hit_rate'} = int($mystat{'Open_tables'}*100/$mystat{'Opened_tables'});
  664.         } else {
  665.                 $mycalc{'table_cache_hit_rate'} = 100;
  666.         }
  667.  
  668.         # Open files
  669.         if ($myvar{'open_files_limit'} > 0) {
  670.                 $mycalc{'pct_files_open'} = int($mystat{'Open_files'}*100/$myvar{'open_files_limit'});
  671.         }
  672.  
  673.         # Table locks
  674.         if ($mystat{'Table_locks_immediate'} > 0) {
  675.                 if ($mystat{'Table_locks_waited'} == 0) {
  676.                         $mycalc{'pct_table_locks_immediate'} = 100;
  677.                 } else {
  678.                         $mycalc{'pct_table_locks_immediate'} = int($mystat{'Table_locks_immediate'}*100/($mystat{'Table_locks_waited'} + $mystat{'Table_locks_immediate'}));
  679.                 }
  680.         }
  681.  
  682.         # Thread cache
  683.         $mycalc{'thread_cache_hit_rate'} = int(100 - (($mystat{'Threads_created'} / $mystat{'Connections'}) * 100));
  684.  
  685.         # Other
  686.         if ($mystat{'Connections'} > 0) {
  687.                 $mycalc{'pct_aborted_connections'} = int(($mystat{'Aborted_connects'}/$mystat{'Connections'}) * 100);
  688.         }
  689.         if ($mystat{'Questions'} > 0) {
  690.                 $mycalc{'total_reads'} = $mystat{'Com_select'};
  691.                 $mycalc{'total_writes'} = $mystat{'Com_delete'} + $mystat{'Com_insert'} + $mystat{'Com_update'} + $mystat{'Com_replace'};
  692.                 if ($mycalc{'total_reads'} == 0) {
  693.                         $mycalc{'pct_reads'} = 0;
  694.                         $mycalc{'pct_writes'} = 100;
  695.                 } else {
  696.                         $mycalc{'pct_reads'} = int(($mycalc{'total_reads'}/($mycalc{'total_reads'}+$mycalc{'total_writes'})) * 100);
  697.                         $mycalc{'pct_writes'} = 100-$mycalc{'pct_reads'};
  698.                 }
  699.         }
  700.  
  701.         # InnoDB
  702.         if ($myvar{'have_innodb'} eq "YES") {
  703.                 $mycalc{'innodb_log_size_pct'} = ($myvar{'innodb_log_file_size'} * 100 / $myvar{'innodb_buffer_pool_size'});
  704.         }
  705. }
  706.  
  707. sub mysql_stats {
  708.         print "\n-------- Performance Metrics -------------------------------------------------\n";
  709.         # Show uptime, queries per second, connections, traffic stats
  710.         my $qps;
  711.         if ($mystat{'Uptime'} > 0) { $qps = sprintf("%.3f",$mystat{'Questions'}/$mystat{'Uptime'}); }
  712.         if ($mystat{'Uptime'} < 86400) { push(@generalrec,"MySQL started within last 24 hours - recommendations may be inaccurate"); }
  713.         infoprint "Up for: ".pretty_uptime($mystat{'Uptime'})." (".hr_num($mystat{'Questions'}).
  714.                 " q [".hr_num($qps)." qps], ".hr_num($mystat{'Connections'})." conn,".
  715.                 " TX: ".hr_num($mystat{'Bytes_sent'}).", RX: ".hr_num($mystat{'Bytes_received'}).")\n";
  716.         infoprint "Reads / Writes: ".$mycalc{'pct_reads'}."% / ".$mycalc{'pct_writes'}."%\n";
  717.  
  718.         # Memory usage
  719.         infoprint "Total buffers: ".hr_bytes($mycalc{'server_buffers'})." global + ".hr_bytes($mycalc{'per_thread_buffers'})." per thread ($myvar{'max_connections'} max threads)\n";
  720.         if ($mycalc{'total_possible_used_memory'} > 2*1024*1024*1024 && $arch eq 32) {
  721.                 badprint "Allocating > 2GB RAM on 32-bit systems can cause system instability\n";
  722.                 badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
  723.         } elsif ($mycalc{'pct_physical_memory'} > 85) {
  724.                 badprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
  725.                 push(@generalrec,"Reduce your overall MySQL memory footprint for system stability");
  726.         } else {
  727.                 goodprint "Maximum possible memory usage: ".hr_bytes($mycalc{'total_possible_used_memory'})." ($mycalc{'pct_physical_memory'}% of installed RAM)\n";
  728.         }
  729.  
  730.         # Slow queries
  731.         if ($mycalc{'pct_slow_queries'} > 5) {
  732.                 badprint "Slow queries: $mycalc{'pct_slow_queries'}% (".hr_num($mystat{'Slow_queries'})."/".hr_num($mystat{'Questions'}).")\n";
  733.         } else {
  734.                 goodprint "Slow queries: $mycalc{'pct_slow_queries'}% (".hr_num($mystat{'Slow_queries'})."/".hr_num($mystat{'Questions'}).")\n";
  735.         }
  736.         if ($myvar{'long_query_time'} > 10) { push(@adjvars,"long_query_time (<= 10)"); }
  737.         if (defined($myvar{'log_slow_queries'})) {
  738.                 if ($myvar{'log_slow_queries'} eq "OFF") { push(@generalrec,"Enable the slow query log to troubleshoot bad queries"); }
  739.         }
  740.  
  741.         # Connections
  742.         if ($mycalc{'pct_connections_used'} > 85) {
  743.                 badprint "Highest connection usage: $mycalc{'pct_connections_used'}%  ($mystat{'Max_used_connections'}/$myvar{'max_connections'})\n";
  744.                 push(@adjvars,"max_connections (> ".$myvar{'max_connections'}.")");
  745.                 push(@adjvars,"wait_timeout (< ".$myvar{'wait_timeout'}.")","interactive_timeout (< ".$myvar{'interactive_timeout'}.")");
  746.                 push(@generalrec,"Reduce or eliminate persistent connections to reduce connection usage")
  747.         } else {
  748.                 goodprint "Highest usage of available connections: $mycalc{'pct_connections_used'}% ($mystat{'Max_used_connections'}/$myvar{'max_connections'})\n";
  749.         }
  750.  
  751.         # Key buffer
  752.         if (!defined($mycalc{'total_myisam_indexes'}) and $doremote == 1) {
  753.                 push(@generalrec,"Unable to calculate MyISAM indexes on remote MySQL server < 5.0.0");
  754.         } elsif ($mycalc{'total_myisam_indexes'} =~ /^fail$/) {
  755.                 badprint "Cannot calculate MyISAM index size - re-run script as root user\n";
  756.         } elsif ($mycalc{'total_myisam_indexes'} == "0") {
  757.                 badprint "None of your MyISAM tables are indexed - add indexes immediately\n";
  758.         } else {
  759.                 if ($myvar{'key_buffer_size'} < $mycalc{'total_myisam_indexes'} && $mycalc{'pct_keys_from_mem'} < 95) {
  760.                         badprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
  761.                         push(@adjvars,"key_buffer_size (> ".hr_bytes($mycalc{'total_myisam_indexes'}).")");
  762.                 } else {
  763.                         goodprint "Key buffer size / total MyISAM indexes: ".hr_bytes($myvar{'key_buffer_size'})."/".hr_bytes($mycalc{'total_myisam_indexes'})."\n";
  764.                 }
  765.                 if ($mystat{'Key_read_requests'} > 0) {
  766.                         if ($mycalc{'pct_keys_from_mem'} < 95) {
  767.                                 badprint "Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
  768.                         } else {
  769.                                 goodprint "Key buffer hit rate: $mycalc{'pct_keys_from_mem'}% (".hr_num($mystat{'Key_read_requests'})." cached / ".hr_num($mystat{'Key_reads'})." reads)\n";
  770.                         }
  771.                 } else {
  772.                         # No queries have run that would use keys
  773.                 }
  774.         }
  775.  
  776.         # Query cache
  777.         if (!mysql_version_ge(4)) {
  778.                 # MySQL versions < 4.01 don't support query caching
  779.                 push(@generalrec,"Upgrade MySQL to version 4+ to utilize query caching");
  780.         } elsif ($myvar{'query_cache_size'} < 1) {
  781.                 badprint "Query cache is disabled\n";
  782.                 push(@adjvars,"query_cache_size (>= 8M)");
  783.         } elsif ($mystat{'Com_select'} == 0) {
  784.                 badprint "Query cache cannot be analyzed - no SELECT statements executed\n";
  785.         } else {
  786.                 if ($mycalc{'query_cache_efficiency'} < 20) {
  787.                         badprint "Query cache efficiency: $mycalc{'query_cache_efficiency'}% (".hr_num($mystat{'Qcache_hits'})." cached / ".hr_num($mystat{'Qcache_hits'}+$mystat{'Com_select'})." selects)\n";
  788.                         push(@adjvars,"query_cache_limit (> ".hr_bytes_rnd($myvar{'query_cache_limit'}).", or use smaller result sets)");
  789.                 } else {
  790.                         goodprint "Query cache efficiency: $mycalc{'query_cache_efficiency'}% (".hr_num($mystat{'Qcache_hits'})." cached / ".hr_num($mystat{'Qcache_hits'}+$mystat{'Com_select'})." selects)\n";
  791.                 }
  792.                 if ($mycalc{'query_cache_prunes_per_day'} > 98) {
  793.                         badprint "Query cache prunes per day: $mycalc{'query_cache_prunes_per_day'}\n";
  794.                         if ($myvar{'query_cache_size'} > 128*1024*1024) {
  795.                             push(@generalrec,"Increasing the query_cache size over 128M may reduce performance");
  796.                         push(@adjvars,"query_cache_size (> ".hr_bytes_rnd($myvar{'query_cache_size'}).") [see warning above]");
  797.                         } else {
  798.                         push(@adjvars,"query_cache_size (> ".hr_bytes_rnd($myvar{'query_cache_size'}).")");
  799.                         }
  800.                 } else {
  801.                         goodprint "Query cache prunes per day: $mycalc{'query_cache_prunes_per_day'}\n";
  802.                 }
  803.         }
  804.  
  805.         # Sorting
  806.         if ($mycalc{'total_sorts'} == 0) {
  807.                 # For the sake of space, we will be quiet here
  808.                 # No sorts have run yet
  809.         } elsif ($mycalc{'pct_temp_sort_table'} > 10) {
  810.                 badprint "Sorts requiring temporary tables: $mycalc{'pct_temp_sort_table'}% (".hr_num($mystat{'Sort_merge_passes'})." temp sorts / ".hr_num($mycalc{'total_sorts'})." sorts)\n";
  811.                 push(@adjvars,"sort_buffer_size (> ".hr_bytes_rnd($myvar{'sort_buffer_size'}).")");
  812.                 push(@adjvars,"read_rnd_buffer_size (> ".hr_bytes_rnd($myvar{'read_rnd_buffer_size'}).")");
  813.         } else {
  814.                 goodprint "Sorts requiring temporary tables: $mycalc{'pct_temp_sort_table'}% (".hr_num($mystat{'Sort_merge_passes'})." temp sorts / ".hr_num($mycalc{'total_sorts'})." sorts)\n";
  815.         }
  816.  
  817.         # Joins
  818.         if ($mycalc{'joins_without_indexes_per_day'} > 250) {
  819.                 badprint "Joins performed without indexes: $mycalc{'joins_without_indexes'}\n";
  820.                 push(@adjvars,"join_buffer_size (> ".hr_bytes($myvar{'join_buffer_size'}).", or always use indexes with joins)");
  821.                 push(@generalrec,"Adjust your join queries to always utilize indexes");
  822.         } else {
  823.                 # For the sake of space, we will be quiet here
  824.                 # No joins have run without indexes
  825.         }
  826.  
  827.         # Temporary tables
  828.         if ($mystat{'Created_tmp_tables'} > 0) {
  829.                 if ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} < 256*1024*1024) {
  830.                         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'} + $mystat{'Created_tmp_tables'})." total)\n";
  831.                         push(@adjvars,"tmp_table_size (> ".hr_bytes_rnd($myvar{'tmp_table_size'}).")");
  832.                         push(@adjvars,"max_heap_table_size (> ".hr_bytes_rnd($myvar{'max_heap_table_size'}).")");
  833.                         push(@generalrec,"When making adjustments, make tmp_table_size/max_heap_table_size equal");
  834.                         push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
  835.                 } elsif ($mycalc{'pct_temp_disk'} > 25 && $mycalc{'max_tmp_table_size'} >= 256) {
  836.                         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";
  837.                         push(@generalrec,"Temporary table size is already large - reduce result set size");
  838.                         push(@generalrec,"Reduce your SELECT DISTINCT queries without LIMIT clauses");
  839.                 } else {
  840.                         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'} + $mystat{'Created_tmp_tables'})." total)\n";
  841.                 }
  842.         } else {
  843.                 # For the sake of space, we will be quiet here
  844.                 # No temporary tables have been created
  845.         }
  846.  
  847.         # Thread cache
  848.         if ($myvar{'thread_cache_size'} eq 0) {
  849.                 badprint "Thread cache is disabled\n";
  850.                 push(@generalrec,"Set thread_cache_size to 4 as a starting value");
  851.                 push(@adjvars,"thread_cache_size (start at 4)");
  852.         } else {
  853.                 if ($mycalc{'thread_cache_hit_rate'} <= 50) {
  854.                         badprint "Thread cache hit rate: $mycalc{'thread_cache_hit_rate'}% (".hr_num($mystat{'Threads_created'})." created / ".hr_num($mystat{'Connections'})." connections)\n";
  855.                         push(@adjvars,"thread_cache_size (> $myvar{'thread_cache_size'})");
  856.                 } else {
  857.                         goodprint "Thread cache hit rate: $mycalc{'thread_cache_hit_rate'}% (".hr_num($mystat{'Threads_created'})." created / ".hr_num($mystat{'Connections'})." connections)\n";
  858.                 }
  859.         }
  860.  
  861.         # Table cache
  862.         if ($mystat{'Open_tables'} > 0) {
  863.                 if ($mycalc{'table_cache_hit_rate'} < 20) {
  864.                         badprint "Table cache hit rate: $mycalc{'table_cache_hit_rate'}% (".hr_num($mystat{'Open_tables'})." open / ".hr_num($mystat{'Opened_tables'})." opened)\n";
  865.                         if (mysql_version_ge(5, 1)) {
  866.                                 push(@adjvars,"table_cache (> ".$myvar{'table_open_cache'}.")");
  867.                         } else {
  868.                                 push(@adjvars,"table_cache (> ".$myvar{'table_cache'}.")");
  869.                         }
  870.                         push(@generalrec,"Increase table_cache gradually to avoid file descriptor limits");
  871.                 } else {
  872.                         goodprint "Table cache hit rate: $mycalc{'table_cache_hit_rate'}% (".hr_num($mystat{'Open_tables'})." open / ".hr_num($mystat{'Opened_tables'})." opened)\n";
  873.                 }
  874.         }
  875.  
  876.         # Open files
  877.         if (defined $mycalc{'pct_files_open'}) {
  878.                 if ($mycalc{'pct_files_open'} > 85) {
  879.                         badprint "Open file limit used: $mycalc{'pct_files_open'}% (".hr_num($mystat{'Open_files'})."/".hr_num($myvar{'open_files_limit'}).")\n";
  880.                         push(@adjvars,"open_files_limit (> ".$myvar{'open_files_limit'}.")");
  881.                 } else {
  882.                         goodprint "Open file limit used: $mycalc{'pct_files_open'}% (".hr_num($mystat{'Open_files'})."/".hr_num($myvar{'open_files_limit'}).")\n";
  883.                 }
  884.         }
  885.  
  886.         # Table locks
  887.         if (defined $mycalc{'pct_table_locks_immediate'}) {
  888.                 if ($mycalc{'pct_table_locks_immediate'} < 95) {
  889.                         badprint "Table locks acquired immediately: $mycalc{'pct_table_locks_immediate'}%\n";
  890.                         push(@generalrec,"Optimize queries and/or use InnoDB to reduce lock wait");
  891.                 } else {
  892.                         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";
  893.                 }
  894.         }
  895.  
  896.         # Performance options
  897.         if (!mysql_version_ge(4, 1)) {
  898.                 push(@generalrec,"Upgrade to MySQL 4.1+ to use concurrent MyISAM inserts");
  899.         } elsif ($myvar{'concurrent_insert'} eq "OFF") {
  900.                 push(@generalrec,"Enable concurrent_insert by setting it to 'ON'");
  901.         } elsif ($myvar{'concurrent_insert'} eq 0) {
  902.                 push(@generalrec,"Enable concurrent_insert by setting it to 1");
  903.         }
  904.         if ($mycalc{'pct_aborted_connections'} > 5) {
  905.                 badprint "Connections aborted: ".$mycalc{'pct_aborted_connections'}."%\n";
  906.                 push(@generalrec,"Your applications are not closing MySQL connections properly");
  907.         }
  908.  
  909.         # InnoDB
  910.         if (defined $myvar{'have_innodb'} && $myvar{'have_innodb'} eq "YES" && defined $enginestats{'InnoDB'}) {
  911.                 if ($myvar{'innodb_buffer_pool_size'} > $enginestats{'InnoDB'}) {
  912.                         goodprint "InnoDB data size / buffer pool: ".hr_bytes($enginestats{'InnoDB'})."/".hr_bytes($myvar{'innodb_buffer_pool_size'})."\n";
  913.                 } else {
  914.                         badprint "InnoDB data size / buffer pool: ".hr_bytes($enginestats{'InnoDB'})."/".hr_bytes($myvar{'innodb_buffer_pool_size'})."\n";
  915.                         push(@adjvars,"innodb_buffer_pool_size (>= ".hr_bytes_rnd($enginestats{'InnoDB'}).")");
  916.                 }
  917.         }
  918. }
  919.  
  920. # Take the two recommendation arrays and display them at the end of the output
  921. sub make_recommendations {
  922.         print "\n-------- Recommendations -----------------------------------------------------\n";
  923.         if (@generalrec > 0) {
  924.                 print "General recommendations:\n";
  925.                 foreach (@generalrec) { print "    ".$_."\n"; }
  926.         }
  927.         if (@adjvars > 0) {
  928.                 print "Variables to adjust:\n";
  929.                 if ($mycalc{'pct_physical_memory'} > 90) {
  930.                         print "  *** MySQL's maximum memory usage is dangerously high ***\n".
  931.                                   "  *** Add RAM before increasing MySQL buffer variables ***\n";
  932.                 }
  933.                 foreach (@adjvars) { print "    ".$_."\n"; }
  934.         }
  935.         if (@generalrec == 0 && @adjvars ==0) {
  936.                 print "No additional performance recommendations are available.\n"
  937.         }
  938.         print "\n";
  939. }
  940.  
  941. # ---------------------------------------------------------------------------
  942. # BEGIN 'MAIN'
  943. # ---------------------------------------------------------------------------
  944. print   "\n >>  MySQLTuner $tunerversion - Major Hayden <major\@mhtx.net>\n".
  945.                 " >>  Bug reports, feature requests, and downloads at http://mysqltuner.com/\n".
  946.                 " >>  Run with '--help' for additional options and output filtering\n";
  947. mysql_setup;                                    # Gotta login first
  948. os_setup;                                               # Set up some OS variables
  949. get_all_vars;                                   # Toss variables/status into hashes
  950. validate_tuner_version;                 # Check current MySQLTuner version
  951. validate_mysql_version;                 # Check current MySQL version
  952. check_architecture;                             # Suggest 64-bit upgrade
  953. check_storage_engines;                  # Show enabled storage engines
  954. security_recommendations;               # Display some security recommendations
  955. calculations;                                   # Calculate everything we need
  956. mysql_stats;                                    # Print the server stats
  957. make_recommendations;                   # Make recommendations based on stats
  958. # ---------------------------------------------------------------------------
  959. # END 'MAIN'
  960. # ---------------------------------------------------------------------------
  961.  
  962. # Local variables:
  963. # indent-tabs-mode: t
  964. # cperl-indent-level: 8
  965. # perl-indent-level: 8
  966. # End:
  967.  

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