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#!/usr/bin/perl # Copyright (c) 2000, 2023, Oracle and/or its affiliates. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License, version 2.0, # as published by the Free Software Foundation. # # This program is also distributed with certain software (including # but not limited to OpenSSL) that is licensed under separate terms, # as designated in a particular file or component or in included license # documentation. The authors of MySQL hereby grant you an additional # permission to link the program and your derivative works with the # separately licensed software that they have included with MySQL. # # 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, version 2.0, for more details. # # You should have received a copy of the GNU Library General Public # License along with this library; if not, write to the Free # Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, # MA 02110-1301, USA # mysqldumpslow - parse and summarize the MySQL slow query log # Original version by Tim Bunce, sometime in 2000. # Further changes by Tim Bunce, 8th March 2001. # Handling of strings with \ and double '' by Monty 11 Aug 2001. use strict; use Getopt::Long; # t=time, l=lock time, r=rows # at, al, and ar are the corresponding averages my %opt = ( s => 'at', h => '*', ); GetOptions(\%opt, 'v|verbose+',# verbose 'help+', # write usage info 'd|debug+', # debug 's=s', # what to sort by (al, at, ar, c, t, l, r) 'r!', # reverse the sort order (largest last instead of first) 't=i', # just show the top n queries 'a!', # don't abstract all numbers to N and strings to 'S' 'n=i', # abstract numbers with at least n digits within names 'g=s', # grep: only consider stmts that include this string 'h=s', # hostname of db server for *-slow.log filename (can be wildcard) 'i=s', # name of server instance (if using mysql.server startup script) 'l!', # don't subtract lock time from total time ) or usage("bad option"); $opt{'help'} and usage(); unless (@ARGV) { my $defaults = `my_print_defaults mysqld`; my $basedir = ($defaults =~ m/--basedir=(.*)/)[0] or die "Can't determine basedir from 'my_print_defaults mysqld' output: $defaults"; warn "basedir=$basedir\n" if $opt{v}; my $datadir = ($defaults =~ m/--datadir=(.*)/)[0]; my $slowlog = ($defaults =~ m/--slow-query-log-file=(.*)/)[0]; if (!$datadir or $opt{i}) { # determine the datadir from the instances section of /etc/my.cnf, if any my $instances = `my_print_defaults instances`; die "Can't determine datadir from 'my_print_defaults mysqld' output: $defaults" unless $instances; my @instances = ($instances =~ m/^--(\w+)-/mg); die "No -i 'instance_name' specified to select among known instances: @instances.\n" unless $opt{i}; die "Instance '$opt{i}' is unknown (known instances: @instances)\n" unless grep { $_ eq $opt{i} } @instances; $datadir = ($instances =~ m/--$opt{i}-datadir=(.*)/)[0] or die "Can't determine --$opt{i}-datadir from 'my_print_defaults instances' output: $instances"; warn "datadir=$datadir\n" if $opt{v}; } if ( -f $slowlog ) { @ARGV = ($slowlog); die "Can't find '$slowlog'\n" unless @ARGV; } else { @ARGV = <$datadir/$opt{h}-slow.log>; die "Can't find '$datadir/$opt{h}-slow.log'\n" unless @ARGV; } } warn "\nReading mysql slow query log from @ARGV\n"; my @pending; my %stmt; $/ = ";\n#"; # read entire statements using paragraph mode while ( defined($_ = shift @pending) or defined($_ = <>) ) { warn "[[$_]]\n" if $opt{d}; # show raw paragraph being read my @chunks = split /^\/.*Version.*started with[\000-\377]*?Time.*Id.*Command.*Argument.*\n/m; if (@chunks > 1) { unshift @pending, map { length($_) ? $_ : () } @chunks; warn "<<".join(">>\n<<",@chunks).">>" if $opt{d}; next; } s/^#? Time: \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+(Z|[+-]\d{2}:\d{2}).*\n//; my ($user,$host,$dummy,$thread_id) = s/^#? User\@Host:\s+(\S+)\s+\@\s+(\S+)\s+\S+(\s+Id:\s+(\d+))?.*\n// ? ($1,$2,$3,$4) : ('','','','',''); s/^# Query_time: ([0-9.]+)\s+Lock_time: ([0-9.]+)\s+Rows_sent: ([0-9.]+).*\n//; my ($t, $l, $r) = ($1, $2, $3); $t -= $l unless $opt{l}; # remove fluff that mysqld writes to log when it (re)starts: s!^/.*Version.*started with:.*\n!!mg; s!^Tcp port: \d+ Unix socket: \S+\n!!mg; s!^Time.*Id.*Command.*Argument.*\n!!mg; s/^use \w+;\n//; # not consistently added s/^SET timestamp=\d+;\n//; s/^[ ]*\n//mg; # delete blank lines s/^[ ]*/ /mg; # normalize leading whitespace s/\s*;\s*(#\s*)?$//; # remove trailing semicolon(+newline-hash) next if $opt{g} and !m/$opt{g}/io; unless ($opt{a}) { s/\b\d+\b/N/g; s/\b0x[0-9A-Fa-f]+\b/N/g; s/''/'S'/g; s/""/"S"/g; s/(\\')//g; s/(\\")//g; s/'[^']+'/'S'/g; s/"[^"]+"/"S"/g; # -n=8: turn log_20001231 into log_NNNNNNNN s/([a-z_]+)(\d{$opt{n},})/$1.('N' x length($2))/ieg if $opt{n}; # abbreviate massive "in (...)" statements and similar s!(([NS],){100,})!sprintf("$2,{repeated %d times}",length($1)/2)!eg; } my $s = $stmt{$_} ||= { users=>{}, hosts=>{} }; $s->{c} += 1; $s->{t} += $t; $s->{l} += $l; $s->{r} += $r; $s->{users}->{$user}++ if $user; $s->{hosts}->{$host}++ if $host; warn "{{$_}}\n\n" if $opt{d}; # show processed statement string } foreach (keys %stmt) { my $v = $stmt{$_} || die; my ($c, $t, $l, $r) = @{ $v }{qw(c t l r)}; $v->{at} = $t / $c; $v->{al} = $l / $c; $v->{ar} = $r / $c; } my @sorted = sort { $stmt{$b}->{$opt{s}} <=> $stmt{$a}->{$opt{s}} } keys %stmt; @sorted = @sorted[0 .. $opt{t}-1] if $opt{t}; @sorted = reverse @sorted if $opt{r}; foreach (@sorted) { my $v = $stmt{$_} || die; my ($c, $t,$at, $l,$al, $r,$ar) = @{ $v }{qw(c t at l al r ar)}; my @users = keys %{$v->{users}}; my $user = (@users==1) ? $users[0] : sprintf "%dusers",scalar @users; my @hosts = keys %{$v->{hosts}}; my $host = (@hosts==1) ? $hosts[0] : sprintf "%dhosts",scalar @hosts; printf "Count: %d Time=%.2fs (%ds) Lock=%.2fs (%ds) Rows=%.1f (%d), $user\@$host\n%s\n\n", $c, $at,$t, $al,$l, $ar,$r, $_; } sub usage { my $str= shift; my $text= <<HERE; Usage: mysqldumpslow [ OPTS... ] [ LOGS... ] Parse and summarize the MySQL slow query log. Options are --verbose verbose --debug debug --help write this text to standard output -v verbose -d debug -s ORDER what to sort by (al, at, ar, c, l, r, t), 'at' is default al: average lock time ar: average rows sent at: average query time c: count l: lock time r: rows sent t: query time -r reverse the sort order (largest last instead of first) -t NUM just show the top n queries -a don't abstract all numbers to N and strings to 'S' -n NUM abstract numbers with at least n digits within names -g PATTERN grep: only consider stmts that include this string -h HOSTNAME hostname of db server for *-slow.log filename (can be wildcard), default is '*', i.e. match all -i NAME name of server instance (if using mysql.server startup script) -l don't subtract lock time from total time HERE if ($str) { print STDERR "ERROR: $str\n\n"; print STDERR $text; exit 1; } else { print $text; exit 0; } }
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