Manual:$wgJobQueueAggregator

Jobs: $wgJobQueueAggregator
Which aggregator to use for tracking which queues have jobs.
Introduced in version:	1.21.0 (Gerrit change 48223; git #d0985f4f)
Removed in version:	1.33.0 (Gerrit change 500161; git #196ef348)
Allowed values:	(array)
Default value:	See below
Other settings: Alphabetical | By function

Details

From DefaultSettings.php:

Default

MediaWiki versions:

1.31 – 1.32

/**
 * Which aggregator to use for tracking which queues have jobs.
 * These settings should be global to all wikis.
 */
$wgJobQueueAggregator = [
	'class' => JobQueueAggregatorNull::class
];

MediaWiki versions:

1.21 – 1.30

$wgJobQueueAggregator = [
	'class' => 'JobQueueAggregatorNull'
];