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#!/usr/bin/perl
# Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; version 2
# of the License.
#
# 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
# Library General Public License 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/--log-slow-queries=(.*)/)[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 $opt{d};
next;
}
s/^#? Time: \d{6}\s+\d+:\d+:\d+.*\n//;
my ($user,$host) = s/^#? User\@Host:\s+(\S+)\s+\@\s+(\S+).*\n// ? ($1,$2) : ('','');
s/^# Query_time: ([0-9.]+)\s+Lock_time: ([0-9.]+)\s+Rows_sent: ([0-9.]+).*\n//;
my ($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;
}
}