![]() In static type, the number of child processes is fixed by pm.max_children parameter, but this type is not flexible for a server with changing web traffic. In dynamic type, the number of child processes is set dynamically based on the PHP-FPM parameters in conf file. The performance of the service drastically varies based on this type. Process manager is mainly of 3 types – dynamic, ondemand and static. This helps us to pinpoint the culprit and take prompt actions to fix it. When we debug such load issues, we analyze the logs and server performance over a period of time. The first thing server owners tend to do for an immediate fix, is to restart the PHP-FPM service. But simply restarting the service is only a band-aid solution, and you will soon see the load spiking. How to perform PHP-FPM tuning for high load Poorly coded or buggy applications abusing the server resources.PHP-FPM configuration is not properly mapped to available server resources.A related service such as MySQL or web server being abused.Too many processes running due to high traffic or attacks.PHP-FPM can lead to high server load due to many reasons: This message means that the PHP-FPM pool is very busy and is unable to handle the high traffic with the existing configuration parameters. WARNING: [pool spawning 32 children, there are 9 idle, and 89 total children While checking the error log, we found some warnings like these. The location for the error logs varies based on the installation path and PHP version. To debug the issue, the first thing we did is to examine the PHP-FPM error logs, which is available in a location such as ” /var/log/ “. But sometimes this service itself causes high load. ![]() It is a FastCGI daemon that allows a website to handle high load. What is PHP-FPM? Why does it cause high load? In our role as Technical Support Services for web hosting companies, configuring and managing the web servers for best performance, is a major task we do.Īnalyzing the reasons for high server load and resolving it, form a part of that service. We got this request recently from a server owner who was facing high CPU load due to PHP-FPM processes. I’ve to restart the service 4 times. We need your help.” “We’re having high overload in the php fpm service (it loads the 16 VCPU with 100%).
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