Cobra Forum

Question: PHP-FPM processes of a domain run for too long


Applicable to:

• Plesk for Linux

Symptoms

• PHP-FPM processes of a domain run for too long, consuming too much memory and causing server malfunction.
• Site contains a never ending script.
• No DDoS attacks detected - can be checked using the How to find what sites are or were under DDoS attack article.
• pm.max_requests parameter is set to unlimited.

Cause

PHP application code doesn't finish, and due to max_requests is unlimited, the php-fpm processes are not being rotated and increasing in resources consumption over time.


Resolution

1.Log in to Plesk.

2.Set the pm.max_requests parameter to 100 in the menu Domains > example.com > PHP Settings and click OK or Apply in the bottom of the page to save the changes:

(https://pix.cobrasoft.org/images/2026/03/05/mXcwdYQHb0Q.png)