mysql测试小工具mybench试用

小型的mysql测试工具，主要有自带的mysqlslap、super-smack和mybench。嗯，我这里的小型的意思是指工具安装过程简单。mysqlslap的使用方法遍地都是，就不先详细写了。根据个人偏好写写mybench吧，毕竟是perl的。安装很简单，如下： cpanm DBI DBD::mysql Tim

小型的mysql测试工具，主要有自带的mysqlslap、super-smack和mybench。嗯，我这里的小型的意思是指工具安装过程简单。 mysqlslap的使用方法遍地都是，就不先详细写了。根据个人偏好写写mybench吧，毕竟是perl的。 安装很简单，如下：

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

但是使用就不是太简单了——mysqlslap会自己生成（-a选项）sql，super-smack则带了一个gen-data程序生成数据然后自动导入，但是mybench没有，所以只能自己搞定数据。 不过mybench还是自己生成了一个测试模版的脚本在/usr/bin/bench_example，很简单的就知道怎么做了。 example如下：

#!/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 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__

然后看看/usr/lib/perl5/site_perl/5.8.8/MyBench.pm，主要内容就是fork和compute：

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($$)
{
#关闭输出缓冲
    $|=1;
    use strict;
    use IO::Pipe;
    use IO::Select;
    $SIG{CHLD} = 'IGNORE';      ## let the kids die
    my $kids_to_fork = shift;
    my $callback     = shift;
    my $num_kids     = 0;
    my @pipes        = ();
    my @pids         = ();
    my $pid          = undef;
    print "forking: ";
    while ($num_kids reader();
            push @pipes, $pipe;
            push @pids,  $pid;
        }
        elsif (defined $pid)
        {
            ## child
#打开管道写入数据的功能
            $pipe->writer();
#执行select_example脚本传入的mysql请求测试函数
            my @result = $callback->($num_kids);
#把结果写入管道
            print $pipe "@result\n";
#关闭管道
            $pipe->close();
            exit 0;
        }
        else
        {
            print "fork failed: $!\n";
        }
    }
    print "\n";
    ## give them a bit of time to setup
    my $time = int($num_kids / 10) + 1;
    print "sleeping for $time seconds while kids get ready\n";
    sleep $time;
 #发送SIGHUP信号给callback函数
    kill 1, @pids;
    ## collect the results
    my @results;
    print "waiting: ";
#从管道中读取数据到数组
    for my $pipe (@pipes)
    {
        my $data = ;
        push @results, $data;
        $pipe->close();
        print "-";
    }
    print "\n";
    return @results;
}
sub compute_results(@)
{
    my $name = shift;
    my $recs = 0;
    my ($Cnt, $Min, $Max, $Avg, $Tot, @Min, @Max);
    while (@_)
    {
        ## 6 elements per record
        my $rec = shift; chomp $rec;
        my ($id, $cnt, $min, $max, $avg, $tot) = split /\s+/, $rec;
        $Cnt += $cnt;
        $Avg += $avg;
        $Tot += $tot;
        push @Min, $min;
        push @Max, $max;
        $recs++;
    }
    $Avg = $Avg / $recs;
    $Min = min(@Min);
    $Max = max(@Max);
    my $Qps = $Cnt / ($Tot / $recs);
    print "$name: $Cnt $Min $Max $Avg $Tot $Qps\n";
    print "  clients : $recs\n";
    print "  queries : $Cnt\n";
    print "  fastest : $Min\n";
    print "  slowest : $Max\n";
    print "  average : $Avg\n";
    print "  serial  : $Tot\n";
    print "  q/sec   : $Qps\n";
}
## some numerical helper functions for arrays
sub max
{
    my $val = $_[0];
    for (@_)
    {
        if ($_ > $val) { $val = $_; }
    }
    return $val;
}
sub min
{
    my $val = $_[0];
    for (@_)
    {
        if ($_ 
好了，开始准备数据，比较懒，直接用super-smack的gen-data先出了一些./gen-data  -n 100000 -f %n,%80-12s%12n,%512-512s,%d > /root/data，然后进mysql里执行：
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;

最后执行./select_bench -h 10.168.170.92 -n 10 -r 1000就能看到结果了：
forking: ++++++++++
sleeping for 2 seconds while kids get ready
waiting: ———-
test: 10000 0.00017 0.006809 0.0010413514 10.413514 9602.9063772325
  clients : 10
  queries : 10000
  fastest : 0.00017
  slowest : 0.006809
  average : 0.0010413514
  serial  : 10.413514
  q/sec   : 9602.9063772325
    

        原文地址：mysql测试小工具mybench试用, 感谢原作者分享。