- Plesk 12.5 for Linux
- Plesk Onyx for Linux
High CPU and memory usage by Apache.
Apache module is used to serve PHP. It is the slowest handler available.
Switch websites to FastCGI by Apache or, better, to PHP-FPM by Apache at Subscriptions > example.com > Hosting Settings:
If the CPU usage is still high, consider enabling and switching to Nginx: Subscriptions > example.com > Apache & nginx Settings > Proxy mode:
Note: nginx does not support .htaccess rules. Code of some websites may not support FastCGI or PHP-FPM, so it is recommended to consult with website developer before switching the handler.