Jump to content

Manual:$wgObjectCaches

From mediawiki.org
Translate this page
Languages:
Cache: $wgObjectCaches
Advanced object cache configuration.
Introduced in version:1.18.0 (r83140)
Removed in version:Still in use
Allowed values:(array)
Default value:see below
Other settings: Alphabetical | By function

Details

[edit]

Advanced object cache configuration.

Use this to define the class names and constructor parameters which are used for the various cache types. Custom cache types may be defined here and referenced from $wgMainCacheType , $wgMessageCacheType , $wgParserCacheType and similar settings.

The format is an associative array where the key is a cache identifier, and the value is an associative array of parameters. The "class" parameter is the class name which will be used. Alternatively, a "factory" parameter may be given, giving a callable function which will generate a suitable cache object.

Standard cache types

[edit]
  • CACHE_ANYTHING - try to find the best available option automatically. Most caches default to this. Will try $wgMainCacheType then MessageCacheType then ParserCacheType (as long as they are set to something usable), then CACHE_DB.
  • CACHE_DB - use the objectcache DB table. Always available but somewhat slow. On a wiki farm, by default it's not shared between multiple wikis, which can cause problems for some use cases.
  • CACHE_MEMCACHED - use Memcached.
  • CACHE_ACCEL - use APCu (or quietly disable caching if it's not available). When writing code, usually you should use MediaWikiServices::getLocalServerObjectCache() instead of using it directly.
  • CACHE_HASH - use in-memory caching, not persisted across requests. Not really useful outside of testing.
  • CACHE_NONE - disable the given type of caching. Usually a bad idea.

Custom cache types

[edit]

You can also create other cache configurations in addition to the built in CACHE_ constants by adding them. For example, to use redis as your cache (which does not have a built in CACHE_XXX constant) you can do: 

$wgObjectCaches['redis'] = [
	'class' => 'RedisBagOStuff',
	'servers' => [
		'127.0.0.1:6379'
	],
	'password' => 'Your-Redis-password', // Highly recommended, otherwise comment out this line.
	'persistent' => true,
];
$wgMainCacheType = 'redis';

The MediaWiki-Vagrant appliance runs a redis service and with this configuration.

You can also change the definition of the default cache types. For example, to make the DB cache be shared across wikis: 

$wgObjectCaches[CACHE_DB] = [
	'class' => SqlBagOStuff::class,
	'loggroup' => 'SQLBagOStuff',
	'server' => [
		'type' => $wgDBtype,
		'host' => $wgDBserver,
		'user' => $wgDBuser,
		'password' => $wgDBpassword,
		// or whatever database you use for central data
		'dbname' => 'shared',
	]
];

Default value

[edit]

The 'slaveOnly' option for SqlBagOStuff (deprecated in 1.34), was removed. Use 'replicaOnly' instead.

MediaWiki version:
≥ 1.43
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => EmptyBagOStuff::class, 'reportDupes' => false ],
	CACHE_DB => [ 'class' => SqlBagOStuff::class, 'loggroup' => 'SQLBagOStuff' ],

	'memcached-php' => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => MemcachedPeclBagOStuff::class, 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => HashBagOStuff::class, 'reportDupes' => false ],

	// Deprecated since 1.35.
	// - To configure a wg*CacheType variable to use the local server cache,
	//   use CACHE_ACCEL instead, which will select these automatically.
	// - To access the object for the local server cache at run-time,
	//   use MediaWikiServices::getLocalServerObjectCache()
	//   instead of e.g. ObjectCache::getInstance( 'apcu' ).
	// - To instantiate a new one of these explicitly, do so directly
	//   by using `new APCUBagOStuff( [ … ] )`
	// - To instantiate a new one of these including auto-detection and fallback,
	//   use ObjectCache::makeLocalServerCache().
	'apc' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'apcu' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
];
MediaWiki version:
1.42
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => EmptyBagOStuff::class, 'reportDupes' => false ],
	CACHE_DB => [ 'class' => SqlBagOStuff::class, 'loggroup' => 'SQLBagOStuff' ],

	'memcached-php' => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => MemcachedPeclBagOStuff::class, 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => HashBagOStuff::class, 'reportDupes' => false ],

	// Deprecated since 1.35.
	// - To configure a wg*CacheType variable to use the local server cache,
	//   use CACHE_ACCEL instead, which will select these automatically.
	// - To access the object for the local server cache at run-time,
	//   use MediaWikiServices::getLocalServerObjectCache()
	//   instead of e.g. ObjectCache::getInstance( 'apcu' ).
	// - To instantiate a new one of these explicitly, do so directly
	//   by using `new APCUBagOStuff( [ … ] )`
	// - To instantiate a new one of these including auto-detection and fallback,
	//   use ObjectCache::makeLocalServerCache().
	'apc' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'apcu' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'wincache' => [ 'class' => WinCacheBagOStuff::class, 'reportDupes' => false ],
];
MediaWiki versions:
1.38 – 1.41
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => EmptyBagOStuff::class, 'reportDupes' => false ],
	CACHE_DB => [ 'class' => SqlBagOStuff::class, 'loggroup' => 'SQLBagOStuff' ],

	CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
	CACHE_ACCEL => [ 'factory' => 'ObjectCache::getLocalServerInstance' ],

	'db-replicated' => [
		'class'        => ReplicatedBagOStuff::class,
		'readFactory'  => [
			'factory' => 'ObjectCache::newFromParams',
			'args'    => [ [ 'class' => SqlBagOStuff::class, 'replicaOnly' => true ] ]
		],
		'writeFactory' => [
			'factory' => 'ObjectCache::newFromParams',
			'args'    => [ [ 'class' => SqlBagOStuff::class, 'replicaOnly' => false ] ]
		],
		'loggroup'     => 'SQLBagOStuff',
		'reportDupes'  => false
	],
	'memcached-php' => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => MemcachedPeclBagOStuff::class, 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => HashBagOStuff::class, 'reportDupes' => false ],

	// Deprecated since 1.35.
	// - To configure a wg*CacheType variable to use the local server cache,
	//   use CACHE_ACCEL instead, which will select these automatically.
	// - To access the object for the local server cache at run-time,
	//   use MediaWikiServices::getLocalServerObjectCache()
	//   instead of e.g. ObjectCache::getInstance( 'apcu' ).
	// - To instantiate a new one of these explicitly, do so directly
	//   by using `new APCUBagOStuff( [ … ] )`
	// - To instantiate a new one of these including auto-detection and fallback,
	//   use ObjectCache::makeLocalServerCache().
	'apc' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'apcu' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'wincache' => [ 'class' => WinCacheBagOStuff::class, 'reportDupes' => false ],
];
MediaWiki versions:
1.35 – 1.37
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => EmptyBagOStuff::class, 'reportDupes' => false ],
	CACHE_DB => [ 'class' => SqlBagOStuff::class, 'loggroup' => 'SQLBagOStuff' ],

	CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
	CACHE_ACCEL => [ 'factory' => 'ObjectCache::getLocalServerInstance' ],
	CACHE_MEMCACHED => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],

	'db-replicated' => [
		'class'        => ReplicatedBagOStuff::class,
		'readFactory'  => [
			'factory' => 'ObjectCache::newFromParams',
			'args'    => [ [ 'class' => SqlBagOStuff::class, 'replicaOnly' => true ] ]
		],
		'writeFactory' => [
			'factory' => 'ObjectCache::newFromParams',
			'args'    => [ [ 'class' => SqlBagOStuff::class, 'replicaOnly' => false ] ]
		],
		'loggroup'     => 'SQLBagOStuff',
		'reportDupes'  => false
	],
	'memcached-php' => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => MemcachedPeclBagOStuff::class, 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => HashBagOStuff::class, 'reportDupes' => false ],

	// Deprecated since 1.35.
	// - To configure a wg*CacheType variable to use the local server cache,
	//   use CACHE_ACCEL instead, which will select these automatically.
	// - To access the object for the local server cache at run-time,
	//   use MediaWikiServices::getLocalServerObjectCache()
	//   instead of e.g. ObjectCache::getInstance( 'apcu' ).
	// - To instantiate a new one of these explicitly, do so directly
	//   by using `new APCUBagOStuff( [ … ] )`
	// - To instantiate a new one of these including auto-detection and fallback,
	//   use ObjectCache::makeLocalServerCache().
	'apc' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'apcu' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'wincache' => [ 'class' => WinCacheBagOStuff::class, 'reportDupes' => false ],
];
MediaWiki version:
1.34
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => EmptyBagOStuff::class, 'reportDupes' => false ],
	CACHE_DB => [ 'class' => SqlBagOStuff::class, 'loggroup' => 'SQLBagOStuff' ],

	CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
	CACHE_ACCEL => [ 'factory' => 'ObjectCache::getLocalServerInstance' ],
	CACHE_MEMCACHED => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],

	'db-replicated' => [
		'class'       => ReplicatedBagOStuff::class,
		'readFactory' => [
			'class' => SqlBagOStuff::class,
			'args'  => [ [ 'replicaOnly' => true ] ]
		],
		'writeFactory' => [
			'class' => SqlBagOStuff::class,
			'args'  => [ [ 'replicaOnly' => false ] ]
		],
		'loggroup'  => 'SQLBagOStuff',
		'reportDupes' => false
	],

	'apc' => [ 'class' => APCBagOStuff::class, 'reportDupes' => false ],
	'apcu' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'wincache' => [ 'class' => WinCacheBagOStuff::class, 'reportDupes' => false ],
	'memcached-php' => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => MemcachedPeclBagOStuff::class, 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => HashBagOStuff::class, 'reportDupes' => false ],
];
MediaWiki versions:
1.31 – 1.33
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => EmptyBagOStuff::class, 'reportDupes' => false ],
	CACHE_DB => [ 'class' => SqlBagOStuff::class, 'loggroup' => 'SQLBagOStuff' ],

	CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
	CACHE_ACCEL => [ 'factory' => 'ObjectCache::getLocalServerInstance' ],
	CACHE_MEMCACHED => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],

	'db-replicated' => [
		'class'       => ReplicatedBagOStuff::class,
		'readFactory' => [
			'class' => SqlBagOStuff::class,
			'args'  => [ [ 'slaveOnly' => true ] ]
		],
		'writeFactory' => [
			'class' => SqlBagOStuff::class,
			'args'  => [ [ 'slaveOnly' => false ] ]
		],
		'loggroup'  => 'SQLBagOStuff',
		'reportDupes' => false
	],

	'apc' => [ 'class' => APCBagOStuff::class, 'reportDupes' => false ],
	'apcu' => [ 'class' => APCUBagOStuff::class, 'reportDupes' => false ],
	'wincache' => [ 'class' => WinCacheBagOStuff::class, 'reportDupes' => false ],
	'memcached-php' => [ 'class' => MemcachedPhpBagOStuff::class, 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => MemcachedPeclBagOStuff::class, 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => HashBagOStuff::class, 'reportDupes' => false ],
];
MediaWiki versions:
1.28 – 1.30
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => 'EmptyBagOStuff', 'reportDupes' => false ],
	CACHE_DB => [ 'class' => 'SqlBagOStuff', 'loggroup' => 'SQLBagOStuff' ],

	CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
	CACHE_ACCEL => [ 'factory' => 'ObjectCache::getLocalServerInstance' ],
	CACHE_MEMCACHED => [ 'class' => 'MemcachedPhpBagOStuff', 'loggroup' => 'memcached' ],

	'db-replicated' => [
		'class'       => 'ReplicatedBagOStuff',
		'readFactory' => [
			'class' => 'SqlBagOStuff',
			'args'  => [ [ 'slaveOnly' => true ] ]
		],
		'writeFactory' => [
			'class' => 'SqlBagOStuff',
			'args'  => [ [ 'slaveOnly' => false ] ]
		],
		'loggroup'  => 'SQLBagOStuff',
		'reportDupes' => false
	],

	'apc' => [ 'class' => 'APCBagOStuff', 'reportDupes' => false ],
	'apcu' => [ 'class' => 'APCUBagOStuff', 'reportDupes' => false ],
	'xcache' => [ 'class' => 'XCacheBagOStuff', 'reportDupes' => false ],
	'wincache' => [ 'class' => 'WinCacheBagOStuff', 'reportDupes' => false ],
	'memcached-php' => [ 'class' => 'MemcachedPhpBagOStuff', 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => 'MemcachedPeclBagOStuff', 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => 'HashBagOStuff', 'reportDupes' => false ],
];
MediaWiki version:
1.27
 
$wgObjectCaches = [
	CACHE_NONE => [ 'class' => 'EmptyBagOStuff', 'reportDupes' => false ],
	CACHE_DB => [ 'class' => 'SqlBagOStuff', 'loggroup' => 'SQLBagOStuff' ],

	CACHE_ANYTHING => [ 'factory' => 'ObjectCache::newAnything' ],
	CACHE_ACCEL => [ 'factory' => 'ObjectCache::getLocalServerInstance' ],
	CACHE_MEMCACHED => [ 'class' => 'MemcachedPhpBagOStuff', 'loggroup' => 'memcached' ],

	'db-replicated' => [
		'class'       => 'ReplicatedBagOStuff',
		'readFactory' => [
			'class' => 'SqlBagOStuff',
			'args'  => [ [ 'slaveOnly' => true ] ]
		],
		'writeFactory' => [
			'class' => 'SqlBagOStuff',
			'args'  => [ [ 'slaveOnly' => false ] ]
		],
		'loggroup'  => 'SQLBagOStuff'
	],

	'apc' => [ 'class' => 'APCBagOStuff', 'reportDupes' => false ],
	'apcu' => [ 'class' => 'APCUBagOStuff', 'reportDupes' => false ],
	'xcache' => [ 'class' => 'XCacheBagOStuff', 'reportDupes' => false ],
	'wincache' => [ 'class' => 'WinCacheBagOStuff', 'reportDupes' => false ],
	'memcached-php' => [ 'class' => 'MemcachedPhpBagOStuff', 'loggroup' => 'memcached' ],
	'memcached-pecl' => [ 'class' => 'MemcachedPeclBagOStuff', 'loggroup' => 'memcached' ],
	'hash' => [ 'class' => 'HashBagOStuff', 'reportDupes' => false ],
];
MediaWiki version:
1.26
 
$wgObjectCaches = array(
	CACHE_NONE => array( 'class' => 'EmptyBagOStuff' ),
	CACHE_DB => array( 'class' => 'SqlBagOStuff', 'loggroup' => 'SQLBagOStuff' ),

	CACHE_ANYTHING => array( 'factory' => 'ObjectCache::newAnything' ),
	CACHE_ACCEL => array( 'factory' => 'ObjectCache::newAccelerator' ),
	CACHE_MEMCACHED => array( 'factory' => 'ObjectCache::newMemcached', 'loggroup' => 'memcached' ),

	'db-replicated' => array(
		'class'       => 'ReplicatedBagOStuff',
		'readFactory' => array(
			'class' => 'SqlBagOStuff',
			'args'  => array( array( 'slaveOnly' => true ) )
		),
		'writeFactory' => array(
			'class' => 'SqlBagOStuff',
			'args'  => array( array( 'slaveOnly' => false ) )
		),
		'loggroup'  => 'SQLBagOStuff'
	),

	'apc' => array( 'class' => 'APCBagOStuff' ),
	'xcache' => array( 'class' => 'XCacheBagOStuff' ),
	'wincache' => array( 'class' => 'WinCacheBagOStuff' ),
	'memcached-php' => array( 'class' => 'MemcachedPhpBagOStuff', 'loggroup' => 'memcached' ),
	'memcached-pecl' => array( 'class' => 'MemcachedPeclBagOStuff', 'loggroup' => 'memcached' ),
	'hash' => array( 'class' => 'HashBagOStuff' ),
);
MediaWiki versions:
1.23 – 1.25
 
$wgObjectCaches = array(
   CACHE_NONE => array( 'class' => 'EmptyBagOStuff' ),
   CACHE_DB => array( 'class' => 'SqlBagOStuff', 'table' => 'objectcache' ),
 
   CACHE_ANYTHING => array( 'factory' => 'ObjectCache::newAnything' ),
   CACHE_ACCEL => array( 'factory' => 'ObjectCache::newAccelerator' ),
   CACHE_MEMCACHED => array( 'factory' => 'ObjectCache::newMemcached' ),
 
   'apc' => array( 'class' => 'APCBagOStuff' ),
   'xcache' => array( 'class' => 'XCacheBagOStuff' ),
   'wincache' => array( 'class' => 'WinCacheBagOStuff' ),
   'memcached-php' => array( 'class' => 'MemcachedPhpBagOStuff' ),
   'memcached-pecl' => array( 'class' => 'MemcachedPeclBagOStuff' ),
   'hash' => array( 'class' => 'HashBagOStuff' ),
);
MediaWiki versions:
1.20 – 1.22
 
$wgObjectCaches = array(
   CACHE_NONE => array( 'class' => 'EmptyBagOStuff' ),
   CACHE_DB => array( 'class' => 'SqlBagOStuff', 'table' => 'objectcache' ),
   CACHE_DBA => array( 'class' => 'DBABagOStuff' ),
 
   CACHE_ANYTHING => array( 'factory' => 'ObjectCache::newAnything' ),
   CACHE_ACCEL => array( 'factory' => 'ObjectCache::newAccelerator' ),
   CACHE_MEMCACHED => array( 'factory' => 'ObjectCache::newMemcached' ),
 
   'apc' => array( 'class' => 'APCBagOStuff' ),
   'xcache' => array( 'class' => 'XCacheBagOStuff' ),
   'wincache' => array( 'class' => 'WinCacheBagOStuff' ),
   'memcached-php' => array( 'class' => 'MemcachedPhpBagOStuff' ),
   'memcached-pecl' => array( 'class' => 'MemcachedPeclBagOStuff' ),
   'hash' => array( 'class' => 'HashBagOStuff' ),
);
MediaWiki version:
1.19
 
$wgObjectCaches = array(
   CACHE_NONE => array( 'class' => 'EmptyBagOStuff' ),
   CACHE_DB => array( 'class' => 'SqlBagOStuff', 'table' => 'objectcache' ),
   CACHE_DBA => array( 'class' => 'DBABagOStuff' ),
 
   CACHE_ANYTHING => array( 'factory' => 'ObjectCache::newAnything' ),
   CACHE_ACCEL => array( 'factory' => 'ObjectCache::newAccelerator' ),
   CACHE_MEMCACHED => array( 'factory' => 'ObjectCache::newMemcached' ),
 
   'apc' => array( 'class' => 'APCBagOStuff' ),
   'xcache' => array( 'class' => 'XCacheBagOStuff' ),
   'wincache' => array( 'class' => 'WinCacheBagOStuff' ),
   'memcached-php' => array( 'class' => 'MemcachedPhpBagOStuff' ),
   'hash' => array( 'class' => 'HashBagOStuff' ),
);
MediaWiki version:
1.18
 
$wgObjectCaches = array(
   CACHE_NONE => array( 'class' => 'EmptyBagOStuff' ),
   CACHE_DB => array( 'class' => 'SqlBagOStuff', 'table' => 'objectcache' ),
   CACHE_DBA => array( 'class' => 'DBABagOStuff' ),

   CACHE_ANYTHING => array( 'factory' => 'ObjectCache::newAnything' ),
   CACHE_ACCEL => array( 'factory' => 'ObjectCache::newAccelerator' ),
   CACHE_MEMCACHED => array( 'factory' => 'ObjectCache::newMemcached' ),

   'eaccelerator' => array( 'class' => 'eAccelBagOStuff' ),
   'apc' => array( 'class' => 'APCBagOStuff' ),
   'xcache' => array( 'class' => 'XCacheBagOStuff' ),
   'wincache' => array( 'class' => 'WinCacheBagOStuff' ),
   'memcached-php' => array( 'class' => 'MemcachedPhpBagOStuff' ),
   'hash' => array( 'class' => 'HashBagOStuff' ),
);
Retrieved from "https://www.mediawiki.org/w/index.php?title=Manual:$wgObjectCaches&oldid=8210290"