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mysql caching is consuming more disk space on 1.18 wikis due to change in parser cache keys
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We're running out of disk space and this needs to be fixed in the next few hours. See

More details may be added, but Roan is currently running a query to see how much space can be cleared up by deleting space used by an old iOS hack.

Version: unspecified
Severity: normal



Event Timeline

bzimport raised the priority of this task from to Medium.Nov 21 2014, 11:47 PM
bzimport set Reference to bz31388.

Domas has a short term workaround, which involves periodically truncating one of the 256 tables in the parser cache. This has had a negative effect on our hit rate:
(note: yellow is bad)

...but, as you can see from the disk utilization graph above, we're not chewing through disk anymore. I'm assigning to Tim since he's responsible for the long-term fix, but Domas has fixed the most urgent problem.

it isn't "periodically truncating one", it is "truncating all over extended period" - as old data will not be referenced anyway.

Turning down priority/severity due to temporary fix.

The immediate crisis is averted. Will create separate bug to make sure we've got regular purging going on.