未完，待续，需要结合具体代码在调试过程中完善：
#!/usr/bin/perl
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 => '*', ); #定义参数 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"); #如果为help参数，调用帮助方法。 $opt{'help'} and usage(); #没有参数的情况下，执行如下代码 unless (@ARGV) { my $defaults = `my_print_defaults mysqld`; #打印mysql配置文件 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; #变形后语句 $/ = ";\n#"; # read entire statements using paragraph mode 处理回车语句 while ( defined($_ = shift @pending) or defined($_ = <>) ) { #如果数组有值，则循环 warn "[[$_]]\n" if $opt{d}; # 如果是调试模式，$_为文本内容 my @chunks = split /^\/.*Version.*started with[\000-\377]*?Time.*Id.*Command.*Argument.*\n/m; #分隔，截取数据内容，剔除表头 if (@chunks > 1) { #判定表头信息处理后还有数据进行处理 unshift @pending, map { length($_) ? $_ : () } @chunks; # @chunks追加参数 warn "<<".join(">>\n<<",@chunks).">>" if $opt{d}; next; } s/^#? Time: \d{6}\s+\d+:\d+:\d+.*\n//; #处理Time my ($user,$host,$dummy,$thread_id) = s/^#? User\@Host:\s+(\S+)\s+\@\s+(\S+)\s+\S+(\s+Id:\s+(\d+))?.*\n// ? ($1,$2,$3,$4) : ('','','','',''); s/^# Query_time: ([0-9.]+)\s+Lock_time: ([0-9.]+)\s+Rows_sent: ([0-9.]+).*\n//; #处理Query_time my ($t, $l, $r) = ($1, $2, $3); $t -= $l unless $opt{l}; # remove fluff that mysqld writes to log when it (re)starts: #移除重启产生的文本 s!^/.*Version.*started with:.*\n!!mg; s!^Tcp port: \d+ Unix socket: \S+\n!!mg; s!^Time.*Id.*Command.*Argument.*\n!!mg; s/^use \w+;\n//; # not consistently added 转换数据库开头的语句 use s/^SET timestamp=\d+;\n//; #SET开头的语句 s/^[ ]*\n//mg; # delete blank lines 删除空行 s/^[ ]*/ /mg; # normalize leading whitespace 规范空格 s/\s*;\s*(#\s*)?$//; # remove trailing semicolon(+newline-hash) ：\s*空格+tab next if $opt{g} and !m/$opt{g}/io; #确定grep参数 unless ($opt{a}) { #确定a参数，是否进行数字转换成N。 s/\b\d+\b/N/g; s/\b0x[0-9A-Fa-f]+\b/N/g; s/''/'S'/g; s/""/"S"/g; s/(\\')//g; s/(\\")//g; s/'[^']+'/'S'/g; s/"[^"]+"/"S"/g; # -n=8: turn log_20001231 into log_NNNNNNNN s/([a-z_]+)(\d{$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=>{} }; #进行数据统计 $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) { #此时%stmt为变形后的语句，计算平均值 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; #排序字段 @sorted = @sorted[0 .. $opt{t}-1] if $opt{t}; #t参数，显示前n行 @sorted = reverse @sorted if $opt{r}; #翻转排序参数 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, $_; } #帮助方法： sub usage { my $str= shift; my $text= <<HERE; help content HERE if ($str) { print STDERR "ERROR: $str\n\n"; print STDERR $text; exit 1; } else { print $text; exit 0; } }