10.5.63. Cache Directives
A number of commented cache directives are supplied by the default Apache HTTP Server configuration file. In most cases, uncommenting these lines by removing the hash mark (
#) from the beginning of the line is sufficient. The following, however, is a list of some of the more important cache-related directives.
CacheEnable— Specifies whether the cache is a disk, memory, or file descriptor cache. By defaultCacheEnableconfigures a disk cache for URLs at or below/.CacheRoot— Specifies the name of the directory containing cached files. The defaultCacheRootis the/var/httpd/proxy/directory.CacheSize— Specifies how much space the cache can use in kilobytes. The defaultCacheSizeis5KB.
The following is a list of some of the other common cache-related directives.
CacheMaxExpire— Specifies how long HTML documents are retained (without a reload from the originating Web server) in the cache. The default is24hours (86400seconds).CacheLastModifiedFactor— Specifies the creation of an expiry (expiration) date for a document which did not come from its originating server with its own expiry set. The defaultCacheLastModifiedFactoris set to0.1, meaning that the expiry date for such documents equals one-tenth of the amount of time since the document was last modified.CacheDefaultExpire— Specifies the expiry time in hours for a document that was received using a protocol that does not support expiry times. The default is set to1hour (3600seconds).NoProxy— Specifies a space-separated list of subnets, IP addresses, domains, or hosts whose content is not cached. This setting is most useful for Intranet sites.
