Help:Configuration parameter "$smwgOnDeleteAction"
|Description||Moves the update process for when a page / property and its value assignments are deleted to the job queue.|
|Default setting||See below|
|First version supported||18.104.22.168|
|Last version supported||2.3.1|
|Keyword||performance · job queue|
$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 22.214.171.124. It was removed in Semantic MediaWiki 2.4.0 in favor of configuration parameter
$smwgEnabledDeferredUpdateSets that updates to pages are queued and executed after edits.1
$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.
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
To modify this configuration setting, add one of the following lines to your "LocalSettings.php" file after the
$smwgOnDeleteAction = array( 'smwgDeleteSubjectAsDeferredJob' => true, 'smwgDeleteSubjectWithAssociatesRefresh' => true );
smwgDeleteSubjectWithAssociatesRefreshis enabled the deletion process is being handled as a deferred background job with
- If configuration parameter
$smwgEnableUpdateJobsDefers some tasks until after a page was edited by using the job queue. 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.
- Task T61204 about the rationale for this parameter
- Semantic MediaWiki: GitHub issue gh:smw:1435