Getting started with CloudLinux OS Shared
Mod_lsapi to improve performance of PHP sites
Using LSAPI, we have seen higher performance than Apache with mod_php, easier installation than php-fpm and easier integration with any control panel. LSAPI means faster and more stable dynamic web pages.
- PHP Selector with alt-php – an easy way to select different PHP versions for each end-user provided by CloudLinux
- Disabled PHP-FPM, mod_ruid2 and apache_itk
- ea-php – alternative to alt-php (cPanel only)
Also recommended for higher security level:
- Configured LVE limits for end-users
- Apache with SuExecuUserGroup directive for each user’s VirtualHost
Mod_lsapi installation on cPanel with EasyApache 4:
Choose a predefined profile with mod_lsapi named with “+mod_lsapi” from WHM > Software > EasyApache 4.
Or, in console, Install packages, make initial setup and update cagefs:
yum install liblsapi liblsapi-devel yum install ea-apache24-mod_lsapi /usr/bin/switch_mod_lsapi --setup cagefsctl --force-update
Enable mod_lsapi for all domains at once:
Then restart apache:
service httpd restart
Used configuration file: /etc/apache2/conf.d/lsapi.conf
Installation on other panels:
Follow the mod_lsapi documentation
The default settings are suitable for most web servers. Useful directives that you may want to change to tune up liblsapi:
lsapi_backend_children – maximum number of simultaneously running children backend processes. Default value is 80. Increase to speed up response time.
lsapi_backend_pgrp_max_idle – how long a control backend process will wait for a new request before it exits, in seconds. Default value is 30. Increase to make faster response; decrease to minimize memory usage.
lsapi_backend_max_process_time – the maximum processing time allowed when processing a request, in seconds. Should match max_execution_time in php.ini settings.
lsapi_backend_max_idle – how long a backend child process will wait for a new request before it exits, in seconds. Increase for better websites performance. Default is 300.
lsapi_backend_max_reqs – how many requests each child process will handle before it exits automatically. Default is 10000.