Disk-backed object cache/status

2011-06-02
The deployment of a disk-backed object cache to increase the parser cache hit ratio was on hold in May, in favor of the 1.17 release work. It will be resumed in June.

2011-07-06
 A couple of deployment attempts were made last week with the MySQL-backed version of this system. They ran in production for a few hours, then tipped over due to table lock contention. Domas devised a workaround, which involves splitting the cache into several tables, which Tim implemented in MediaWiki. Tim plans to deploy the new version on July 11, sometime after 00:00 UTC (during business hours in Australia). 