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234 lines
8 KiB
Bash
234 lines
8 KiB
Bash
#!/usr/bin/perl
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# Copyright (c) 2000-2002, 2005-2008 MySQL AB, 2008, 2009 Sun Microsystems, Inc.
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# Use is subject to license terms.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Library General Public
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# License as published by the Free Software Foundation; version 2
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# of the License.
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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 GNU
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# Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with this library; if not, write to the Free
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# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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# MA 02110-1301, USA
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# mysqldumpslow - parse and summarize the MySQL slow query log
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# Original version by Tim Bunce, sometime in 2000.
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# Further changes by Tim Bunce, 8th March 2001.
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# Handling of strings with \ and double '' by Monty 11 Aug 2001.
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use strict;
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use Getopt::Long;
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# t=time, l=lock time, r=rows, a=rows affected
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# at, al, ar and aa 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, ae, c, t, l, r, e)
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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/basename 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 $datadir = ($defaults =~ m/--datadir=(.*)/g)[-1];
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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 instances' 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=(.*)/g)[-1]
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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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my $slowlog = ($defaults =~ m/--log[-_]slow[-_]queries=(.*)/g)[-1];
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if (!$slowlog)
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{
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$slowlog = ($defaults =~ m/--slow[-_]query[-_]log[-_]file=(.*)/g)[-1];
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}
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if ( $slowlog )
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{
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@ARGV = ($slowlog);
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die "Can't find '$slowlog'\n" unless @ARGV;
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}
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else
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{
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if (!$opt{h})
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{
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$opt{h}= ($defaults =~ m/--log[-_]basename=(.*)/g)[-1];
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}
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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 $opt{d};
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next;
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}
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s/^#? Time: \d{6}\s+\d+:\d+:\d+.*\n//;
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my ($user,$host) = s/^#? User\@Host:\s+(\S+)\s+\@\s+(\S+).*\n// ? ($1,$2) : ('','');
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s/^# Thread_id: [0-9]+\s+Schema: .*\s+QC_hit:.*[^\n]+\n//;
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s/^# Query_time: ([0-9.]+)\s+Lock_time: ([0-9.]+)\s+Rows_sent: ([0-9.]+)\s+Rows_examined: ([0-9.]+).*\n//;
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my ($t, $l, $r, $e) = ($1, $2, $3, $4);
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s/^# Rows_affected: ([0-9.]+).*\n//;
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my ($a) = ($1);
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$t -= $l unless $opt{l};
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# remove fluff that mysqld writes to log when it (re)starts:
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s!^/.*Version.*started with:.*\n!!mg;
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s!^Tcp port: \d+ Unix socket: \S+\n!!mg;
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s!^Time.*Id.*Command.*Argument.*\n!!mg;
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# Remove optimizer info
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s!^# QC_Hit: \S+\s+Full_scan: \S+\s+Full_join: \S+\s+Tmp_table: \S+\s+Tmp_table_on_disk: \S+[^\n]+\n!!mg;
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s!^# Filesort: \S+\s+Filesort_on_disk: \S+[^\n]+\n!!mg;
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s!^# Full_scan: \S+\s+Full_join: \S+[^\n]+\n!!mg;
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s/^use \w+;\n//; # not consistently added
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s/^SET timestamp=\d+;\n//;
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s/^[ ]*\n//mg; # delete blank lines
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s/^[ ]*/ /mg; # normalize leading whitespace
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s/\s*;\s*(#\s*)?$//; # 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->{e} += $e;
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$s->{a} += $a;
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$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, $e, $a) = @{ $v }{qw(c t l r e a)};
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$v->{at} = $t / $c;
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$v->{al} = $l / $c;
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$v->{ar} = $r / $c;
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$v->{ae} = $e / $c;
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$v->{aa} = $a / $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, $e, $ae, $a, $aa) = @{ $v }{qw(c t at l al r ar e ae a aa)};
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my @users = keys %{$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_sent=%.1f (%d), Rows_examined=%.1f (%d), Rows_affected=%.1f (%d), $user\@$host\n%s\n\n",
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$c, $at,$t, $al,$l, $ar,$r, $ae, $e, $aa, $a, $_;
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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, ae, c, l, r, e, 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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aa: average rows affected
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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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