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标题: Apache2.4的MPM模式（event） [打印本页]
作者: admin    时间: 2021-3-18 15:26     标题: Apache2.4的MPM模式（event）

笺注：这是在 CentOS8安装LAMP+phpMyAdmin 的基础上进行的。 查看Apache的版本： [root@centos8 ~]# httpd -v Server version: Apache/2.4.37 (centos) Server built: Jun 8 2020 20:14:33 查看Apache现在使用的MPM模式： [root@centos8 ~]# httpd -V Server version: Apache/2.4.37 (centos) Server built: Jun 8 2020 20:14:33 Server's Module Magic Number: 20120211:83 Server loaded: APR 1.6.3, APR-UTIL 1.6.1 Compiled using: APR 1.6.3, APR-UTIL 1.6.1 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="/etc/httpd" -D SUEXEC_BIN="/usr/sbin/suexec" -D DEFAULT_PIDLOG="run/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" 笺注：Apache2.4有三种稳定的MPM（Multi-Processing Module，多进程处理模块）模式，分别是prefork、worker、event。 event是通过线程来处理请求，一个父进程建立多个子进程，而子进程又会建立多个线程；对高并发的支持较好； 创建PHP测试页： [root@centos8 ~]# cat /var/www/html/phpinfo.php [root@centos8 ~]# ab -n 1000 -c 300 http://192.168.168.154/phpinfo.php  #指定并发请求数为300，总请求数为1000，对http://192.168.168.154/phpinfo.php进行压力测试 This is ApacheBench, Version 2.3 <$Revision: 1843412 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.168.154 (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Completed 800 requests Completed 900 requests Completed 1000 requests Finished 1000 requests Server Software: Apache/2.4.37 Server Hostname: 192.168.168.154 Server Port: 80 Document Path: /phpinfo.php Document Length: 82221 bytes Concurrency Level: 300 Time taken for tests: 3.014 seconds Complete requests: 1000 Failed requests: 343 (Connect: 0, Receive: 0, Length: 343, Exceptions: 0) Total transferred: 82409626 bytes HTML transferred: 82236626 bytes Requests per second: 331.75 [#/sec] (mean) Time per request: 904.300 [ms] (mean) Time per request: 3.014 [ms] (mean, across all concurrent requests) Transfer rate: 26698.48 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 103 84.8 93 1144 Processing: 52 681 586.6 452 2964 Waiting: 6 569 504.8 428 2338 Total: 52 784 549.4 578 2982 Percentage of the requests served within a certain time (ms) 50% 578 66% 807 75% 953 80% 986 90% 1181 95% 2359 98% 2360 99% 2737 100% 2982 (longest request) 笺注：可以看到每秒最大处理请求次数为331.75次，每个请求响应时间是3.014毫秒。 加大并发请求数、总请求数进行测试： #指定并发请求数为3800，总请求数为4000 [root@centos8 ~]# ab -n 4000 -c 3800 http://192.168.168.154/phpinfo.php This is ApacheBench, Version 2.3 <$Revision: 1843412 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.168.154 (be patient) socket: Too many open files (24) 操作系统的“进程最大可打开文件数”的查询方法： [root@centos8 ~]# ulimit -n 1024 操作系统的“进程最大可打开文件数”的修改方法： [root@centos8 ~]# tail -5 /etc/security/limits.conf # End of file * soft nproc 65535 * hard nproc 65535 * soft nofile 65535 * hard nofile 65535 重启服务器： [root@centos8 ~]# reboot 服务器重启后，更改生效： [root@centos8 ~]# ulimit -n 65535 加大并发请求数、总请求数进行测试： #指定并发请求数为3800，总请求数为4000 [root@centos8 ~]# ab -n 4000 -c 3800 http://192.168.168.154/phpinfo.php This is ApacheBench, Version 2.3 <$Revision: 1843412 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 192.168.168.154 (be patient) Completed 400 requests Completed 800 requests Completed 1200 requests Completed 1600 requests Completed 2000 requests Completed 2400 requests Completed 2800 requests Completed 3200 requests Completed 3600 requests Completed 4000 requests Finished 4000 requests Server Software: Apache/2.4.37 Server Hostname: 192.168.168.154 Server Port: 80 Document Path: /phpinfo.php Document Length: 82221 bytes Concurrency Level: 3800 Time taken for tests: 33.754 seconds Complete requests: 4000 Failed requests: 402 (Connect: 0, Receive: 0, Length: 402, Exceptions: 0) Total transferred: 329208095 bytes HTML transferred: 328516095 bytes Requests per second: 118.51 [#/sec] (mean) Time per request: 32065.873 [ms] (mean) Time per request: 8.438 [ms] (mean, across all concurrent requests) Transfer rate: 9524.70 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 654 1291.5 269 8032 Processing: 110 4286 6050.1 1557 33242 Waiting: 36 2288 4442.6 425 23205 Total: 138 4940 6265.9 1796 33658 Percentage of the requests served within a certain time (ms) 50% 1796 66% 4075 75% 6798 80% 9241 90% 14094 95% 18524 98% 23156 99% 26691 100% 33658 (longest request) 笺注：可以看到每秒最大处理请求次数为118.51次，每个请求响应时间是8.438毫秒。 相关文章： Apache2.4的MPM模式（event/prefork）



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