$smwgMainCacheType

Configuration parameter details:
Name	$smwgMainCacheType
Description	Sets which object cache Semantic MediaWiki should use to track temporary changes
Default setting	CACHE_ANYTHING
Software	Semantic MediaWiki
Since version	2.3.0
Until version	still available
Configuration	Cache
Keyword	cache · object cache · performance

$smwgMainCacheType is a configuration parameter that sets the object cache Semantic MediaWiki should use to track temporary changes. The configuration parameter was introduced in Semantic MediaWiki 2.3.0Released on 29 October 2015 and compatible with MW 1.19.0 - 1.25.x..1

This configuration parameter was not being used until Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x.. It now superseded starting with Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x.. Thus you are advised to migrate your settings in "LocalSettings.php" to the new configuration parameter after the release of Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x. since the superseded one will be removed with one of the upcoming releases of Semantic MediaWiki.

Default setting[edit]

$smwgMainCacheType = CACHE_ANYTHING;

This means that by default it uses the cache defined by configuration parameter $wgMainCacheType (MediaWiki.org) for object caching.

Available cache providers[edit]

All predefined cache types as provided by configuration parameter $wgMainCacheType (MediaWiki.org) or a custom cache type as set with configuration parameter $wgObjectCaches (MediaWiki.org), e.g. Redis which is the recommended cache provider2 to account for an optimal response time, storage capacity, and independence from the DB master.

CACHE_NONE: Does not caching (predefined)
CACHE_ANYTHING: Allows to use whatever cache provider is available (predefined)
CACHE_ACCEL: Allows to use "APC" as cache provider (predefined)
CACHE_MEMCACHED: Allows to use "memcached" as cache provider (predefined, requires additional setup on the server)
CACHE_DB: Allows to use the relational database backend as cache provider (predefined)
redis: Allows to use "Redis" as cache provider (custom, requires additional setup on the server)

Changing the default setting[edit]

To modify the setting to this configuration parameter, add one of the following lines to your "LocalSettings.php" file after the enableSemantics() call:

Disable cache usage for Semantic MediaWiki

$smwgMainCacheType = CACHE_NONE;

This means that Semantic MediaWiki itself will not use any caching mechanism.

Use "memcached" as cache provider

$smwgMainCacheType = CACHE_MEMCACHED;

Note:

Additional setup on the wiki's server is required to be able to used this cache provider.

Use "redis" as cache provider

$smwgMainCacheType = 'redis';