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nosql - 高并发下Apache+mongodb的php驱动不稳定

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2016-06-06 20:52:021278browse

我的环境 : Apache/2.2.21 (Win32) PHP/5.4.3
nosql - 高并发下Apache+mongodb的php驱动不稳定
nosql - 高并发下Apache+mongodb的php驱动不稳定
测试代码 :

<?php $db=new Mongo("mongodb://localhost:27017");
$c=$db->selectDB("npm")->selectCollection("user");
$user = $c->findOne(array('userName' => 'admin','passWord'=>'admin'));
if($user){
echo var_dump($user);
}
echo var_dump($db);
?>

使用apache并发测试工具 ab.exe 测试,测试命令如下

D:\Apache2.2\bin>ab.exe -n 100  http://192.168.15.21/a.php

测试结果:

Concurrency Level:      1
Time taken for tests:   0.266 seconds
Complete requests:      100
Failed requests:        58
   (Connect: 0, Receive: 0, Length: 58, Exceptions: 0)
Write errors:           0
Total transferred:      888192 bytes
HTML transferred:       870668 bytes
Requests per second:    376.47 [#/sec] (mean)
Time per request:       2.656 [ms] (mean)
Time per request:       2.656 [ms] (mean, across all concurrent requests)
Transfer rate:          3265.41 [Kbytes/sec] received

php错误信息:

[13-Jun-2012 07:40:26 UTC] PHP Notice:  Unknown: localhost:27017: pool done (0x3877a10) in Unknown on line 0

回复内容:

我的环境 : Apache/2.2.21 (Win32) PHP/5.4.3
nosql - 高并发下Apache+mongodb的php驱动不稳定
nosql - 高并发下Apache+mongodb的php驱动不稳定
测试代码 :

<?php $db=new Mongo("mongodb://localhost:27017");
$c=$db->selectDB("npm")->selectCollection("user");
$user = $c->findOne(array('userName' => 'admin','passWord'=>'admin'));
if($user){
echo var_dump($user);
}
echo var_dump($db);
?>

使用apache并发测试工具 ab.exe 测试,测试命令如下

D:\Apache2.2\bin>ab.exe -n 100  http://192.168.15.21/a.php

测试结果:

Concurrency Level:      1
Time taken for tests:   0.266 seconds
Complete requests:      100
Failed requests:        58
   (Connect: 0, Receive: 0, Length: 58, Exceptions: 0)
Write errors:           0
Total transferred:      888192 bytes
HTML transferred:       870668 bytes
Requests per second:    376.47 [#/sec] (mean)
Time per request:       2.656 [ms] (mean)
Time per request:       2.656 [ms] (mean, across all concurrent requests)
Transfer rate:          3265.41 [Kbytes/sec] received

php错误信息:

[13-Jun-2012 07:40:26 UTC] PHP Notice:  Unknown: localhost:27017: pool done (0x3877a10) in Unknown on line 0

首先建议你设置一下php mongo的pool size,在你初始化Mongo对象之前

MongoPool::setSize(100);

这样可以提高mongo的连接效率,特别是在大并发的情况下。另外,你的ab命令使用有误

  1. 你使用了-n 100,这个数目太小了,一般都要设置在上千次以上
  2. 你没有使用-c参数设置并发数,导致ab是根据总数的极限来压并发,这样并不科学

你应该使用

ab.exe -n 1000 -c 100  http://192.168.15.21/a.php

这样是在100的并发下,完成1000次请求。你可以根据自己的情况调整这两个参数。

最后要说的是,有时候出现报错,并不是不稳定,每个服务器都有它的极限,比如你现在用的是windows xp来测试服务器性能,它的硬件,还有软件优化程度(比如半开连接数),都会很大的影响最终性能。

如果你想科学的测试服务器性能,建议使用专门的服务器,并选用经过标准优化了的linux操作系统。

Try the lastest version of mongo php driver
Check this out:

https://github.com/mongodb/mongo-php-...

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