213 lines
7.5 KiB
Perl
213 lines
7.5 KiB
Perl
#!/usr/bin/perl
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# Copyright (c) 2000, 2021, Oracle and/or its affiliates.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License, version 2.0,
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# as published by the Free Software Foundation.
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#
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# This program is also distributed with certain software (including
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# but not limited to OpenSSL) that is licensed under separate terms,
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# as designated in a particular file or component or in included license
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# documentation. The authors of MySQL hereby grant you an additional
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# permission to link the program and your derivative works with the
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# separately licensed software that they have included with MySQL.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License, version 2.0, for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# mysqldumpslow - parse and summarize the MySQL slow query log
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use strict;
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use Getopt::Long;
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# t=time, l=lock time, r=rows
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# at, al, and ar are the corresponding averages
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my %opt = (
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s => 'at',
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h => '*',
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);
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GetOptions(\%opt,
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'v|verbose+',# verbose
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'help+', # write usage info
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'd|debug+', # debug
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's=s', # what to sort by (al, at, ar, c, t, l, r)
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'r!', # reverse the sort order (largest last instead of first)
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't=i', # just show the top n queries
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'a!', # don't abstract all numbers to N and strings to 'S'
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'n=i', # abstract numbers with at least n digits within names
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'g=s', # grep: only consider stmts that include this string
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'h=s', # hostname of db server for *-slow.log filename (can be wildcard)
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'i=s', # name of server instance (if using mysql.server startup script)
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'l!', # don't subtract lock time from total time
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) or usage("bad option");
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$opt{'help'} and usage();
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unless (@ARGV) {
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my $defaults = `my_print_defaults mysqld`;
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my $basedir = ($defaults =~ m/--basedir=(.*)/)[0]
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or die "Can't determine basedir from 'my_print_defaults mysqld' output: $defaults";
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warn "basedir=$basedir\n" if $opt{v};
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my $datadir = ($defaults =~ m/--datadir=(.*)/)[0];
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my $slowlog = ($defaults =~ m/--slow-query-log-file=(.*)/)[0];
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if (!$datadir or $opt{i}) {
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# determine the datadir from the instances section of /etc/my.cnf, if any
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my $instances = `my_print_defaults instances`;
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die "Can't determine datadir from 'my_print_defaults mysqld' output: $defaults"
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unless $instances;
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my @instances = ($instances =~ m/^--(\w+)-/mg);
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die "No -i 'instance_name' specified to select among known instances: @instances.\n"
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unless $opt{i};
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die "Instance '$opt{i}' is unknown (known instances: @instances)\n"
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unless grep { $_ eq $opt{i} } @instances;
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$datadir = ($instances =~ m/--$opt{i}-datadir=(.*)/)[0]
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or die "Can't determine --$opt{i}-datadir from 'my_print_defaults instances' output: $instances";
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warn "datadir=$datadir\n" if $opt{v};
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}
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if ( -f $slowlog ) {
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@ARGV = ($slowlog);
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die "Can't find '$slowlog'\n" unless @ARGV;
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} else {
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@ARGV = <$datadir/$opt{h}-slow.log>;
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die "Can't find '$datadir/$opt{h}-slow.log'\n" unless @ARGV;
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}
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}
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warn "\nReading mysql slow query log from @ARGV\n";
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my @pending;
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my %stmt;
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$/ = ";\n#"; # read entire statements using paragraph mode
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while ( defined($_ = shift @pending) or defined($_ = <>) ) {
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warn "[[$_]]\n" if $opt{d}; # show raw paragraph being read
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my @chunks = split /^\/.*Version.*started with[\000-\377]*?Time.*Id.*Command.*Argument.*\n/m;
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if (@chunks > 1) {
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unshift @pending, map { length($_) ? $_ : () } @chunks;
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warn "<<".join(">>\n<<",@chunks).">>" if $opt{d};
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next;
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}
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s/^#? Time: \d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+(Z|[+-]\d{2}:\d{2}).*\n//;
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my ($user,$host,$dummy,$thread_id) = s/^#? User\@Host:\s+(\S+)\s+\@\s+(\S+)\s+\S+(\s+Id:\s+(\d+))?.*\n// ? ($1,$2,$3,$4) : ('','','','','');
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s/^# Query_time: ([0-9.]+)\s+Lock_time: ([0-9.]+)\s+Rows_sent: ([0-9.]+).*\n//;
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my ($t, $l, $r) = ($1, $2, $3);
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$t -= $l unless $opt{l};
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# remove fluff that mysqld writes to log when it (re)starts:
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s!^/.*Version.*started with:.*\n!!mg;
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s!^Tcp port: \d+ Unix socket: \S+\n!!mg;
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s!^Time.*Id.*Command.*Argument.*\n!!mg;
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s/^use \w+;\n//; # not consistently added
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s/^SET timestamp=\d+;\n//;
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s/^[ ]*\n//mg; # delete blank lines
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s/^[ ]*/ /mg; # normalize leading whitespace
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s/\s*;\s*(#\s*)?$//; # remove trailing semicolon(+newline-hash)
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next if $opt{g} and !m/$opt{g}/io;
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unless ($opt{a}) {
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s/\b\d+\b/N/g;
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s/\b0x[0-9A-Fa-f]+\b/N/g;
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s/''/'S'/g;
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s/""/"S"/g;
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s/(\\')//g;
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s/(\\")//g;
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s/'[^']+'/'S'/g;
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s/"[^"]+"/"S"/g;
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# -n=8: turn log_20001231 into log_NNNNNNNN
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s/([a-z_]+)(\d{$opt{n},})/$1.('N' x length($2))/ieg if $opt{n};
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# abbreviate massive "in (...)" statements and similar
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s!(([NS],){100,})!sprintf("$2,{repeated %d times}",length($1)/2)!eg;
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}
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my $s = $stmt{$_} ||= { users=>{}, hosts=>{} };
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$s->{c} += 1;
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$s->{t} += $t;
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$s->{l} += $l;
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$s->{r} += $r;
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$s->{users}->{$user}++ if $user;
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$s->{hosts}->{$host}++ if $host;
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warn "{{$_}}\n\n" if $opt{d}; # show processed statement string
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}
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foreach (keys %stmt) {
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my $v = $stmt{$_} || die;
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my ($c, $t, $l, $r) = @{ $v }{qw(c t l r)};
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$v->{at} = $t / $c;
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$v->{al} = $l / $c;
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$v->{ar} = $r / $c;
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}
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my @sorted = sort { $stmt{$b}->{$opt{s}} <=> $stmt{$a}->{$opt{s}} } keys %stmt;
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@sorted = @sorted[0 .. $opt{t}-1] if $opt{t};
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@sorted = reverse @sorted if $opt{r};
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foreach (@sorted) {
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my $v = $stmt{$_} || die;
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my ($c, $t,$at, $l,$al, $r,$ar) = @{ $v }{qw(c t at l al r ar)};
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my @users = keys %{$v->{users}};
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my $user = (@users==1) ? $users[0] : sprintf "%dusers",scalar @users;
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my @hosts = keys %{$v->{hosts}};
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my $host = (@hosts==1) ? $hosts[0] : sprintf "%dhosts",scalar @hosts;
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printf "Count: %d Time=%.2fs (%ds) Lock=%.2fs (%ds) Rows=%.1f (%d), $user\@$host\n%s\n\n",
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$c, $at,$t, $al,$l, $ar,$r, $_;
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}
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sub usage {
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my $str= shift;
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my $text= <<HERE;
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Usage: mysqldumpslow [ OPTS... ] [ LOGS... ]
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Parse and summarize the MySQL slow query log. Options are
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--verbose verbose
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--debug debug
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--help write this text to standard output
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-v verbose
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-d debug
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-s ORDER what to sort by (al, at, ar, c, l, r, t), 'at' is default
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al: average lock time
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ar: average rows sent
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at: average query time
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c: count
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l: lock time
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r: rows sent
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t: query time
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-r reverse the sort order (largest last instead of first)
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-t NUM just show the top n queries
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-a don't abstract all numbers to N and strings to 'S'
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-n NUM abstract numbers with at least n digits within names
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-g PATTERN grep: only consider stmts that include this string
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-h HOSTNAME hostname of db server for *-slow.log filename (can be wildcard),
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default is '*', i.e. match all
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-i NAME name of server instance (if using mysql.server startup script)
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-l don't subtract lock time from total time
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HERE
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if ($str) {
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print STDERR "ERROR: $str\n\n";
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print STDERR $text;
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exit 1;
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} else {
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print $text;
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exit 0;
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}
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}
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