Manual:$wgAntiLockFlags

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This is the latest sighted revision, approved on 8 August 2009. The draft has template/file changes awaiting review.

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Miscellaneous settings: $wgAntiLockFlags
Anti-lock flags.
Introduced in version:	1.4.0
Removed in version:	still in use
Allowed Values:	bitfield - see below
Default Value:	0

[edit] Details

Anti-lock flags. This is a bitfield.

ALF_PRELOAD_LINKS: Preload links during link update for save.
ALF_PRELOAD_EXISTENCE: Preload cur_id during replaceLinkHolders
ALF_NO_LINK_LOCK: Don't use locking reads when updating the link table. This is necessary for wikis with a high edit rate for performance reasons, but may cause link table inconsistency. (This option was introduced in 1.5.0)
ALF_NO_BLOCK_LOCK: As for ALF_LINK_LOCK, this flag is a necessity for high-traffic wikis. (This option was introduced in 1.5.0)