Optimization of PHP-FPM parameters under high concurrency and high load

Optimization of PHP-FPM parameters under high concurrency and high load Optimization of PHP-FPM parameters under high concurrency and high load

Mainly for parameter tuning of PHP in Linux

Adjust file descriptor limits

# Ulimit-n 1000000

# Vi/etc/security/limits. conf

# Setting Shell Limits for File Descriptors

* Soft nofile 1000000

* Hard nofile 1000000

Disable the file system access time update in the partition where the PHP code file is located

# Vi/etc/fstab

For example, the partition where the PHP code is located:

/Dev/sdb1 ext4 errors = remount-ro 0 1

To:

/Dev/sdb1 ext4 noatime, nodiratime, errors = remount-ro 0 1

Store temporary files to tmpfs

(Note) when a website needs to process a large number of small image uploads, it uses the memory file system tmpfs for storage, which can reduce the I/O overhead. however, if you upload a very large file (such as a video), tmpfs is not suitable.

# Vi/etc/fstab

Tmpfs/tmp tmpfs defaults, nosuid, noatime 0 0

Php. ini configuration optimization

# Vi php-app.ini

[PHP]

Engine = On

Expose_php = Off

Max_execution_time = 5

Memory_limit = 256 M

Error_reporting = E_ALL &~ E_DEPRECATED

Display_errors = Off

Display_startup_errors = Off

Html_errors = Off

Default_socket_timeout = 5

File_uploads = On

Upload_tmp_dir =/tmp/php

Upload_max_filesize = 50 M

Post_max_size = 50 M

Max_file_uploads = 20

Date. timezone = 'Asia/Shanghai'

Note that max_execution_time is set to only 5 seconds. for a fast web application, we really don't want any web requests that run for a long time in the web application. a web request lasts for more than five seconds, which usually means something goes wrong. our goal is that the page response should be within-Ms.

PHP-FPM configuration tuning

# Vi php-fpm.conf

[My_app]

; FastCGI/PHP-FPM using UNIX Sockets

Listen =/data/my_app/tmp/php. sock

Listen. backlog = 300.

User = www

Group = www

Pm = dynamic

; Estimate pm. max_children = (MAX_MEMORY-500 MB)/20 MB

Pm. max_children = 100

; Recommended as % 10 of the maximum pm. max_children

Pm. start_servers = 10

Pm. min_spare_servers = 5

Pm. max_spare_servers = 15

Pm. max_requests = 1000

Pm. status_path =/php_status

Request_terminate_timeout = 0

Request_slowlog_timeout = 0

Slowlog =/data/my_app/logs/slow. log

The above is a summary of these parameters.