CODEWITHSUNDEEP
phpdockernginx
Aleksandar Bozhinov
Aleksandar Bozhinov

Reputation: 21

Huge CPU load - php-fpm + nginx

I use php-fpm with STATIC pools and the problem is that 2-3 pools from 20 are used with 80-100% CPU. Other php pools stay unused.

My question is: Why other 17 processes stay unused?

We used AWS instance c4.large. Our docker image use 1024 Units of CPU and 2560 MB ram.

DOCKER containers in instance

ALL PROCESSES in container

TOP screenshot

Upvotes: 0

Views: 1960

Answers (1)

Meiram Chuzhenbayev
Meiram Chuzhenbayev

Reputation: 906

The PHP-FPM pm static setting depends heavily on how much free memory your server has. Basically if you are suffering from low server memory, then pm ondemand or dynamic maybe be better options. On the other hand, if you have the memory available you can avoid much of the PHP process manager (PM) overhead by setting pm static to the max capacity of your server. In other words, when you do the math, pm.static should be set to the max amount of PHP-FPM processes that can run without creating memory availability or cache pressure issues. Also, not so high as to overwhelm CPU(s) and have a pile of pending PHP-FPM operations.

Upvotes: 1

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