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Manual:$wgAntiLockFlags

From mediawiki.org
Miscellaneous settings: $wgAntiLockFlags
Anti-lock flags.
Introduced in version:1.4.0
Removed in version:1.25.0 (Gerrit change 164115; git #12757b50)
Allowed values:(bitfield - see below)
Default value:0

Details

Anti-lock flags. This is a bitfield. The constants are set in Defines.php .

ALF_PRELOAD_LINKS
Preload links during link update for save. (This option has no effect since 1.6.0)
ALF_PRELOAD_EXISTENCE
Preload cur_id during replaceLinkHolders. (This option has no effect since 1.5.0)
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 and has no effect since 1.18.0)

Example

To reduce lock contention, at the expense of introducing occasional inconsistencies, set:

$wgAntiLockFlags = ALF_NO_LINK_LOCK | ALF_NO_BLOCK_LOCK;