~drizzle-trunk/drizzle/development

#!/usr/bin/perl

# 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,

    'verbose|v+',# verbose

    'help+',	# write usage info

    'debug|d+',	# debug

    's=s',	# what to sort by (t, at, l, al, r, ar etc)

    '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: (\d+)  Lock_time: (\d+)  Rows_sent: (\d+).*\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 (t, at, l, al, r, ar etc), 'at' is default

  -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;

    }

}