Help:$smwgOnDeleteAction

Title	$smwgOnDeleteAction
Description	Moves the update process for when a page / property and its value assignments are deleted to the job queue.
Default setting	array( … );
Software	Semantic MediaWiki
Introduced with	1.9.0.1
Deprecated with	still available
Configuration	Installation
Keyword	Performance · Job queue
Referenced by	N/A

$smwgOnDeleteAction is a configuration parameter that is used to move the update process for when a page / property and its value assignments are deleted to the job queue and thus to improve it. The setting was introduced in Semantic MediaWiki 1.9.0.1.

Default setting

$GLOBALS['smwgOnDeleteAction'] = array(
	'smwgDeleteSubjectAsDeferredJob' => false,
	'smwgDeleteSubjectWithAssociatesRefresh' => false
);

The default setting represents the legacy behaviour (SMW ≤ 1.8.0) where a subject is directly deleted when "action=delete" is executed.

Available options

• smwgDeleteSubjectAsDeferredJob - Defers the deletion process to a background job.
• smwgDeleteSubjectWithAssociatesRefresh - Allows to refresh entities that are connected to a deleted subject.

Changing the default setting

Due to performance implications it is advisable that in case smwgDeleteSubjectWithAssociatesRefresh is enabled the deletion process is being handled as a deferred background job with smwgDeleteSubjectAsDeferredJob enabled, too:

$smwgOnDeleteAction = array(
	'smwgDeleteSubjectAsDeferredJob' => true,
	'smwgDeleteSubjectWithAssociatesRefresh' => true
);

Notes

• If $smwgEnableUpdateJobs is disabled (not default) then the deletion process will always run directly even though smwgDeleteSubjectAsDeferredJob (see above) is enabled.
• In case the deletion is executed as deferred job it is further suggested that the job queue is being run repeatedly within a narrow time frame to avoid an increased backlog.

See also

• bug 59204 about the rationale for this parameter