production.
=== Configuration changes in 1.23 ===
+* When $wgJobRunRate is higher that zero, jobs are now executed via an
+ asynchronous HTTP request to a MediaWiki entry point. This may require
+ increasing the number of server worker threads.
* $wgDebugLogGroups values may be set to an associative array with a
'destination' key specifying the log destination. The array may also contain
a 'sample' key with a positive integer value N indicating that the log group