mysql测试小工具mybench试用

cpanm DBI DBD::mysql Time::HiRes
wget http://jeremy.zawodny.com/mysql/mybench/mybench-1.0.tar.gz
tar zxvf mybench-1.0.tar.gz
cd mybench-1.0
perl MakeFile.PL && make && make install

#!/usr/bin/perl -w
eval 'exec /usr/bin/perl -w -S $0 ${1+"$@"}'
 if 0; # not running under some shell
use strict;
use MyBench;
use Getopt::Std;
use Time::HiRes qw(gettimeofday tv_interval);
use DBI;
my %opt;
Getopt::Std::getopt('n:r:h:', \%opt);
#这是我见过的最hardcode的perl脚本了（呃，除了我自己写的垃圾），连db库、用户名、密码都不给运行参数的
my $num_kids = $opt{n} || 10;
my $num_runs = $opt{r} || 100;
my $db = "test";
my $user = "test";
my $pass = "";
my $port = 3306;
my $host = $opt{h} || "192.168.0.1";
my $dsn = "DBI:mysql:$db:$host;port=$port";
my $callback = sub
{
 my $id = shift;
 my $dbh = DBI->connect($dsn, $user, $pass, { RaiseError => 1 });
#为测试准备的请求，测select就写select，测insert就写insert呗~
#如果不修改，也就是说测试用的是test.mytable表，而且必须有一个列叫id
 my $sth = $dbh->prepare("SELECT * FROM mytable WHERE ID = ?");
 my $cnt = 0;
 my @times = ();
 ## wait for the parent to HUP me
 local $SIG{HUP} = sub { };
 sleep 600;
#脚本定义的每个进程执行多少次请求
 while ($cnt < $num_runs)
 {
 my $v = int(rand(100_000));
 ## time the query
 my $t0 = [gettimeofday];
#真正的执行sql请求，通过上面的rand知道，之前准备的test.mytable的id列必须是int格式，同时不少于10w行（又一处hard）
 $sth->execute($v);
#通过前后两次gettimeofday获得sql的exec耗时
 my $t1 = tv_interval($t0, [gettimeofday]);
#完成一次请求执行，加入数组
 push @times, $t1;
 $sth->finish();
 $cnt++;
 }
 ## cleanup
 $dbh->disconnect();
#计算本进程全部请求的各项数据，几个大小和均来自MyBench模块
 my @r = ($id, scalar(@times), min(@times), max(@times), avg(@times), tot(@times));
 return @r;
};
#将上面这个函数交给MyBench模块的fork_and_work执行，即并发指定数量请求，返回总的结果
my @results = MyBench::fork_and_work($num_kids, $callback);
#计算总的数据
MyBench::compute_results('test', @results);
exit;
__END__

package MyBench;
use strict;
$main::VERSION = '1.0';
use Exporter;
@MyBench::ISA = 'Exporter';
#导出求最大值、最小值、平均值、综合值的函数给外面用
@MyBench::EXPORT = qw(max min avg tot);
sub fork_and_work($$)
{
#关闭

USE test;
CREATE TABLE mytable (id INT(11) NOT NULL AUTO_INCREMENT, col1 CHAR(100), col2 CHAR(100), col3 INT(11), PRIMARY KEY (id) )ENGINE=InnoDB DEFAULT CHARSET=utf8;
LOAD DATA LOCAL INFILE 'data' REPLACE INTO TABLE 'mytable' FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n';
INSERT INTO mytable (col1,col2,col3) SELECT col1,col2,col3 FROM mytable;