"Original" NGINX+PHP-FPM Optimization skills Summary ____php

PHP-FPM installation is simple, see PHP (PHP-FPM) manual compilation installation. The following is mainly about how to improve the performance of NGINX+PHP-FPM.
1.Unix domain Socket communication
A brief introduction to UNIX domain socket this way of communication, see: NGINX+PHP-FPM Socket Configuration method
UNIX domain sockets do improve the performance of Nginx and PHP-FPM communications because they do not go to the network, but they can be unstable when concurrency is high. Nginx will frequently complain: connect () to Unix:/dev/shm/php-fcgi.sock failed (11:resource temporarily unavailable) while connecting T o Upstream
There are two ways to improve stability: 1 The backlog configuration method in Nginx and PHP-FPM is: Under Server for this domain name in nginx configuration file, add default listen after backlog=1024 80. The Listen.backlog in the configuration php-fpm.conf is 1024, and the default is 128. 2 Add sock file and php-fpm instance number, then create a new sock file, in Nginx through the upstream module to balance the request load to two sock files behind the two sets of PHP-FPM instance.

2.PHP-FPM parameter Tuning
2.1 Number of processes
PHP-FPM Initial/idle/maximum number of worker processes Pm.max_children = Pm.start_servers = Pm.min_spare_servers = 5 pm.max_s Pare_servers = 35
2.2 Maximum number of processing requests
The maximum number of processing requests means that a PHP-FPM worker process terminates after processing as many requests, and the master process respawn a new one.      The primary purpose of this configuration is to avoid memory leaks caused by Third-party libraries referenced by PHP interpreters or programs. Pm.max_requests = 10240
2.3 Maximum Execution time
The maximum execution time can be configured in both PHP.ini and php-fpm.conf, and the configuration items are Max_execution_time and request_terminate_timeout respectively. Its effect and its effect see also: Nginx 502 and 504 error detailed

3.php-fpm High CPU usage Troubleshooting method
3.1CPU Use rate monitoring method
1 if the top command executes the top command directly, the CPU usage of each core can be seen by entering 1. And the sampling time can be shortened by top-d 0.1. The following SAR seems to be the shortest possible only 1 seconds.
2 SAR command SAR and iostat command installation: Sysstat.x86_64:The SAR and iostat system monitoring commands Yum install-y sysstat.x 86_64
Executive Sar-p all 1 100. -p all means to monitor all cores, 1 for every 1 seconds, and 100 for 100 times. The output results are as follows: Cpu     %user     %nice   %system    %iowait    %steal     %idle all      85.54      0.00      5.69       0.00      0.00       8.76    0     74.75      0.00      25.25      0.00      0.00       0.00    1     98.00       0.00      2.00      0.00       0.00      0.00    2     89.22      0.00       3.92      0.00      0.00       6.86    3     91.00      0.00       2.00      0.00       0.00      7.00    4     75.00       0.00      9.00      0.00       0.00     16.00    5      94.95      0.00      5.05       0.00      0.00      0.00    6&NBsp;    95.00      0.00       4.00      0.00      0.00       1.00    7     87.88      0.00       4.04      0.00       0.00      8.08    8     93.94       0.00      3.03      0.00       0.00      3.03    9      88.00      0.00      3.00       0.00      0.00      9.00 10      89.11      0.00      2.97       0.00      0.00       7.92 11     82.35      0.00       3.92      0.00      0.00      13.73 12     73.27      0.00       7.92      0.00       0.00     18.81 13     81.44       0.00      4.12      0.00       0.00     14.43 14     77.23       0.00      6.93      0.00       0.00     15.84 15     78.79       0.00      4.04      0.00       0.00     17.17
3.2 Open Slow log
Configure output PHP-FPM slow log with a threshold of 2 seconds: request_slowlog_timeout = 2 Slowlog = log/$pool. Log.slow
Analyze the rollup using the Sort/uniq command php-fpm slow log: [root@b28-12 log]# grep-v "^$" www.log.slow.tmp | Cut-d ""-F 3,2 | Sort | uniq-c | SORT-K1,1NR | Head-n 5181 Run ()/www/test.net/framework/web/filters/cfilter.php:41