Manual:$wgInvalidateCacheOnLocalSettingsChange

Cache: $wgInvalidateCacheOnLocalSettingsChange
Setting this to true will invalidate all cached pages whenever LocalSettings.php is changed
Introduced in version:	1.17.0 (r77878)
Removed in version:	still in use
Allowed values:	Boolean
Default value:	true

Other settings: Alphabetical | By Function

Setting this to true will invalidate all cached pages whenever LocalSettings.php is changed. This is useful so that if you install a new extension, any old pages that were cached before the extension was installed are re-rendered.

On high-traffic wikis, this should be set to false, to avoid the need to check the file modification time, and to avoid the performance impact of unnecessary cache invalidations.

In older versions of MediaWiki, this was done by default in LocalSettings.php using code like $wgCacheEpoch = max( $wgCacheEpoch, gmdate( 'YmdHis', @filemtime( __FILE__ ) ) );

See also

• Manual:$wgCacheEpoch

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