Php-fpm TcpSocket vs UnixSocket
Php-fpm TcpSocket vs UnixSocket
有很多人推荐使用php-fpm的UnixSocket的方式,尝试测试之
简单准备了一个测试页面,包含一些循环、判断、加减、以及常用的phpinfo
- <?php
- function make_seed() {
- list($usec,$sec)=explode(' ',microtime());
- return(float) $sec+((float)$usec*100000);
- }
- $i=0;
- $k=0;
- while($i < 1000){
- $i++;
- mt_srand(make_seed());
- if($i%2 == 0)
- $k += mt_rand();
- else
- $k -= mt_rand();
- }
- echo $k;
- phpinfo();
- ?>
测试方法:
- 在同网段找一台服务器
- 使用webbench来测试
- ./webbench -c 500 -t 30 http://ip/cgi-bin/Liv.php
- cat nginx-access.log | grep -v 200 | grep WebBench | wc -l
- 检查返回内容的稳定性
测试结果(每种测试3次,每次都重启nginx和php-fpm):
Tcp socket的情况
- 异常返回:4
- Speed=14502 pages/min, 11660916 bytes/sec.
- Requests: 7251 susceed, 0 failed.
- 异常返回:0
- Speed=14480 pages/min, 11644002 bytes/sec.
- Requests: 7240 susceed, 0 failed.
- 异常返回:1 (http 499 客户端断开连接)
- Speed=14542 pages/min, 11693312 bytes/sec.
- Requests: 7271 susceed, 0 failed.
Unix socket的情况(放在/dev/shm中)
- 异常返回:388
- Speed=15194 pages/min, 11600151 bytes/sec.
- Requests: 7596 susceed, 1 failed.
- 异常返回:271
- Speed=15020 pages/min, 11644336 bytes/sec.
- Requests: 7510 susceed, 0 failed.
- 异常返回:831
- Speed=16110 pages/min, 11625129 bytes/sec.
- Requests: 8054 susceed, 1 failed.
Unix socket的情况(放在/tmp中)
- 异常返回:230
- Speed=14972 pages/min, 11632380 bytes/sec.
- Requests: 7459 susceed, 27 failed.
- 异常返回:647
- Speed=15804 pages/min, 11687138 bytes/sec.
- Requests: 7898 susceed, 4 failed.
- 异常返回:698
- Speed=15944 pages/min, 11685551 bytes/sec.
- Requests: 7972 susceed, 0 failed.
针对上面的测试结果,简单总结一下,未必客观,仅供参考:
- UnixSocket性能比TcpSocket最多高不超过10%
- UnixSocket的异常率比TcpSocket至少高226倍
- UnixSocket返回异常时,Http Code 502,php-fpm返回11: Resource temporarily unavailable,google后尝试修改backlog,但结果无明显变化
- 结论:在查明UnixSocket异常原因之前,建议依然使用TcpSocket(即默认的127.0.0.1:9000方式)
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