Enable compression

In ISPmanager you can configure compression of a website static content which includes files that can be easily modified (images, music, video, etc.). As a rule, such files consume much space and slow down your website.

Content compression is available if you use the Nginx or OpenLiteSpeed web server. To configure compression for:

• Nginx — when creating or editing a WWW domain, enable the Сompression option and specify the Compression level. The maximum compression value is 9. The minimum is 1. The recommended value is 5.
• OpenLiteSpeed — when creating or editing a WWW domain, enable the Сompression option. The compression level for OpenLiteSpeed is not configurable.

Technical details for Nginx

The ngx_http_gzip_module module is a filter that compresses a request with gzip, enabling to reduce data size. If the compression is enabled, the following information is added into the Nginx configuration file for the WWW-domain: 

Nginx configuration file

gzip on;
gzip_comp_level <compression level>;
gzip_disable "msie6";
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript

Perform the following steps to modify a list of data types:

1. Add the variable into the ISPmanager configuration file (the default location is /usr/local/mgr5/etc/ispmgr.conf):

   ISPmanager configuration file

   path nginx-gzip-types <data types>

   E.g.:

   ISPmanager configuration file

   path nginx-gzip-types text/plain text/css

2. Restart the control panel

   /usr/local/mgr5/sbin/mgrctl -m ispmgr exit

3. To apply the settings to the existing WWW-domains go to  Domains → WWW-domains → Website management → Website settings and click Ok.

For more information about ngx_http_gzip_module please refer to the official website.