CacheGuard OS
User's Guide - Version 5.7.6

Web Cache

Cached Object Max Size

For performance reasons, the appliance caches only objects with a size lesser than or equal to a given value called the Cached Object Max Size. So objects larger than this value are not saved in the persistent cache memory. The Cached Object Max Size may be modified for specific needs. This parameter should be manipulated with caution.

Note that higher values may rapidly saturate the persistent cache memory but save the network bandwidth while lower values cache smaller objects and therefore increase performance. To set the Cached Object Max Size to 10 Giga Byte use the following command (the size should be specified in KiloBytes):

cache maxobject 10240

We advise that you leave this parameter at its default value of 5120 KB (5 GigaByte). In modifying this value it is assumed that you know what you are doing for your specific needs.

Forcing a URL Load

In some cases (buggy Web sites, forcing the update...) an URL needs to be explicitly reloaded in the appliance's cache. To force the loading of a URL use the command "cache" followed by the argument "loadurl" and the URL to fetch. For instance to force the loading of the URL http://www.example.com/example.html use the command:

cache loadurl http://www.example.com/example.html

Displaying a Report

If you want to know how much the caching module contributes to optimizing your Internet bandwidth you can use the command "cache report". This command displays the total cache size, the amount of the cache space filled by Web objects and the amount of data retrieved from the cache compared to all data passing through the system. To display the cache report use the following command:

cache report