Cache Name

Short Description

Update

Content view cache

Cached node result.

On publish

Global INI

Recursively removes settings cache. Removes all files under var/cache/ini

On change
(auto)

INI cache

Recursively removes settings cache. Removes all files under var/<sitefolder>/cache/ini

(auto)

Codepage cache

Removes the char translation tables.
Recursively removes all files under var/<sitefolder>/cache/codepage

??

Expiry cache

On expire
(auto)

Class identifier

Recursively removes all files under var/<sitefolder>/cache based on a regular expression.

Auto

Sort key cache

Recursively removes all files under var/<sitefolder>/cache based on a regular expression

Auto

URL alias cache

Cache contains a mapping of node urls to node ids.

Recursively removes all files under var/<sitefolder>/cache/wildcard

Auto

Character transformation cache

Cache contains character mapping for url generation, search keywords translation and other.
Recursively removes all files under var/<sitefolder>/cache/trans

?

Image alias

Cache contains all system generated image aliases ( resized images based on uploaded image ).

Clearing that cache causes all images to get re-created.

Auto
unused alias are never remove

Template cache

Included templates get cached. When using a lot of template includes that cache directory can contain a lot of files ( {include uri...}in template laguage ).
Recursively removes all files under var/<sitefolder>/cache/template

Auto/manual

Template block cache

Cache contains all cache blocks ( {cache-block...}in template laguage ).
Recursively removes all files under var/<sitefolder>/cache/template-block

Every 2 hours or when content expire

Template override cache

Cached version of the override.ini configuration file.

Recursively removes all files under var/<sitefolder>/cache/override

RSS cache

Recursively removes all files under var/<sitefolder>/cache/rss (often xml files)

Check setting file

User info cache

Cache contains user permission.

Recursively removes all files under var/<sitefolder>/cache/user-info