On Mon, Nov 28, 2011 at 8:59 PM, Neil Harris <[email protected]> wrote: > I hadn't thought properly about cache stampedes: since the parser cache is > only part of page rendering, this might also explain some of the other > occasional slowdowns I've seen on Wikipedia. > > It would be really cool if there could be some sort of general mechanism to > enable this to be prevented this for all page URLs protected by memcaching, > throughout the system. > I'm not very familiar with PoolCounter but I suspect it's a fairly generic system for handling this sort of thing. However, stampedes have never been a practical problem for anything except massive traffic combined with slow recaching, and that's a fairly rare case. So I don't think we want to add that sort of concurrency protection everywhere.
Roan _______________________________________________ Wikitech-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikitech-l
