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Sim
Asked: 2017-09-16 05:36:15 +0800 CST

apache2 mpm_event 对配置更改没有反应

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我想增加并行打开连接的数量（阅读：服务器收到请求，但需要时间来处理，然后再回答，客户端正在等待）。我编写了一个测试 php 脚本来测试我是否实现了托管在 apache2 实例上的目标：

<?php
$time = new DateTime();
echo date_timestamp_get($time);
echo "<br>Hello World";
sleep(20);
echo "<br>bye world<br>";
$time = new DateTime();
echo date_timestamp_get($time);
?>

阿帕奇版本信息：

apachectl -V
Server version: Apache/2.4.23 (Unix)
Server built:   Oct 17 2016 11:09:09
Server's Module Magic Number: 20120211:61
Server loaded:  APR 1.5.2, APR-UTIL 1.5.4
Compiled using: APR 1.5.2, APR-UTIL 1.5.4
Architecture:   64-bit
Server MPM:     event
  threaded:     yes (fixed thread count)
    forked:     yes (variable process count)
Server compiled with....
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_SYSVSEM_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=256
 -D HTTPD_ROOT="/bitnami/lampstack-linux-x64/output/apache2"
 -D SUEXEC_BIN="/bitnami/lampstack-linux-x64/output/apache2/bin/suexec"
 -D DEFAULT_PIDLOG="logs/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"

加载的模块有：

Loaded Modules:
 core_module (static)
 so_module (static)
 http_module (static)
 authn_file_module (shared)
 authn_core_module (shared)
 authz_host_module (shared)
 authz_groupfile_module (shared)
 authz_user_module (shared)
 authz_core_module (shared)
 access_compat_module (shared)
 auth_basic_module (shared)
 socache_shmcb_module (shared)
 reqtimeout_module (shared)
 filter_module (shared)
 substitute_module (shared)
 deflate_module (shared)
 mime_module (shared)
 log_config_module (shared)
 env_module (shared)
 headers_module (shared)
 unique_id_module (shared)
 setenvif_module (shared)
 version_module (shared)
 proxy_module (shared)
 proxy_connect_module (shared)
 proxy_ftp_module (shared)
 proxy_http_module (shared)
 proxy_fcgi_module (shared)
 proxy_scgi_module (shared)
 proxy_wstunnel_module (shared)
 proxy_ajp_module (shared)
 proxy_balancer_module (shared)
 proxy_express_module (shared)
 slotmem_shm_module (shared)
 ssl_module (shared)
 lbmethod_byrequests_module (shared)
 lbmethod_bytraffic_module (shared)
 lbmethod_bybusyness_module (shared)
 mpm_event_module (shared)
 unixd_module (shared)
 status_module (shared)
 autoindex_module (shared)
 negotiation_module (shared)
 dir_module (shared)
 actions_module (shared)
 alias_module (shared)
 rewrite_module (shared)

与mpm模块相关的配置httpd.conf是：

LoadModule mpm_event_module modules/mod_mpm_event.so
#LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
#LoadModule mpm_worker_module modules/mod_mpm_worker.so
[...]
<IfModule mpm_prefork_module>
  StartServers    20
  MinSpareServers 20
  MaxSpareServers 20
  <IfVersion >= 2.3>
    MaxRequestWorkers       20
    MaxConnectionsPerChild  5000
  </IfVersion>
  <IfVersion < 2.3 >
    MaxClients              20
    MaxRequestsPerChild     5000
  </IfVersion>
  KeepAliveTimeout 1
</IfModule>

<IfModule mpm_event_module>
  ServerLimit               15
  StartServers              15
  MinSpareThreads         128
  MaxSpareThreads         192
  ThreadsPerChild          64
  MaxRequestWorkers       256
  MaxConnectionsPerChild 5000
  KeepAliveTimeout          2
</IfModule>

我正在（手动）在我的浏览器中运行 8 个请求来访问测试脚本，并希望access.log输出显示请求都在几秒钟内完成。但是日志的输出显示了不同的画面：

192.168.56.1 - - [16/Aug/2017:21:00:43 +0000] "GET /test.php HTTP/1.1" 200 58
192.168.56.1 - - [16/Aug/2017:21:01:03 +0000] "GET /test.php HTTP/1.1" 200 58
192.168.56.1 - - [16/Aug/2017:21:01:05 +0000] "GET /test.php HTTP/1.1" 200 58
192.168.56.1 - - [16/Aug/2017:21:01:05 +0000] "GET /test.php HTTP/1.1" 200 58
192.168.56.1 - - [16/Aug/2017:21:01:06 +0000] "GET /test.php HTTP/1.1" 200 58
192.168.56.1 - - [16/Aug/2017:21:01:07 +0000] "GET /test.php HTTP/1.1" 200 58
192.168.56.1 - - [16/Aug/2017:21:01:23 +0000] "GET /test.php HTTP/1.1" 200 59
192.168.56.1 - - [16/Aug/2017:21:01:25 +0000] "GET /test.php HTTP/1.1" 200 59

我浏览器中的输出与access.log输出匹配：

1.
1502917243
Hello World
bye world
1502917263

2.
1502917263
Hello World
bye world
1502917283

3.
1502917265
Hello World
bye world
1502917285

4.
1502917265
Hello World
bye world
1502917286

5.
1502917266
Hello World
bye world
1502917286

6.
1502917267
Hello World
bye world
1502917287

7.
1502917283
Hello World
bye world
1502917303

8.
1502917285
Hello World
bye world
1502917305

处理第一个请求，完成后处理接下来的五个请求，然后处理剩余的请求，很容易看出批处理之间的延迟是由于进程仍然被 sleep 命令保持打开状态。

更改配置后，我确实重新启动了 apache 服务。更改配置后，我确实重新启动了整台机器。两种操作都没有导致不同的结果，所以我的理论是我没有正确进行配置。

使用top列出活动进程和过滤使用COMMAND=httpd.bin显示下图：

 1298 root      20   0  136508   4624   2876 S  0.0  0.5   0:00.15 httpd.bin                                                                                                                                                                                                                                                                                                                                                           
 1347 daemon    20   0  876188   7192   2412 S  0.0  0.7   0:00.61 httpd.bin                                                                                                                                                                                                                                                                                                                                                           
 1348 daemon    20   0  876188   6956   2260 S  0.0  0.7   0:00.61 httpd.bin                                                                                                                                                                                                                                                                                                                                                           
 1349 daemon    20   0 1072796   7364   2416 S  0.0  0.7   0:00.62 httpd.bin

我该如何解决这个问题/我的配置哪里出错了？

apache2

1 个回答

  1. Best Answer

    经过大量的研究和调试，我终于找到了原因。php-fpm.bin工人一次被限制为 5 个。pm.max_children在相应的配置文件中增加一个更高的数字解决了这个问题。

    • 0

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