Help:$smwgEnableUpdateJobs

is a configuration parameter that defers some tasks until after a page was edited by using the MediaWiki job queueing system. The configuration parameter was introduced in Semantic MediaWiki 1.2.0.

For example, when the type of a property is changed, all affected pages will be scheduled for (later) update. If a wiki generates too many jobs in this way, the following setting can be used to disable jobs. Note that this will cause some parts of the semantic data to get out of date, so that manual modifications (page edits) or the use of maintenance script "rebuildData.php" ("SMW_refreshData.php" ≤ 1.9.1) might be necessary.

Note that the parameter  (≥ SMW 1.9.0.1) is dependant on the setting of this parameter.