Ævar Arnfjörð Bjarmason wrote: > The first thing that should be done is to ensure that MediaWiki's > caching infrastructure, both internal (memcache, message cache etc) > and external (squid) is correctly set up and all working optimally > together. I discussed this briefly with TomH on IRC which told me to > contact Grant regarding this, which I've done. I'd be happy to take a > look at it to see if anything can be improved. > >
emailed offlist... The current squid server was meant to be a temporary loan... it needs to move somewhere better later. > If it's correctly set up (anonymous user) requests should either > bypass MW entirely or alternatively at least hit some cache or other > for the stuff that's computationally expensive. Although there are > some edge cases of course like when a template that's used 5 levels > deep by a few hundred other templates needs to be invalidated. But > from looking at RC it looks like the wiki has around 5-50 changes in > the Template: namespace per day so it shouldn't be that unmanageable. > > "anonymous users" often have cookie set... causing cache misses. The machine runs squid WITHOUT X-Vary-Options patch! Squid server is used in production for other low usage clients. When the templates change, load spikes on the mediawiki server. Load Avg: ~2 to ~18. On the single processor machine. It takes awhile to settle down. Squid Log examples: 1231921832.295 15911 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Map_Features - NONE/- - 1231921832.303 0 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/DE:Map_Features - NONE/- - 1231921832.310 4 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/IT:Map_Features - NONE/- - 1231921832.318 3 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/FR:Map_Features - NONE/- - 1231921832.326 0 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Cz:Map_Features - NONE/- - 1231921832.367 3 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Ro:Map_Features - NONE/- - 1231921832.403 9 89.16.177.88 TCP_MISS/200 103 PURGE http://wiki.openstreetmap.org/wiki/Da:Map_Features - NONE/- - 1231921832.412 6 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Hu:Map_Features - NONE/- - 1231921832.452 5 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Ja:Map_Features - NONE/- - 1231921832.459 7 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Fi:Map_Features - NONE/- - 1231921832.480 4 89.16.177.88 TCP_MISS/404 110 PURGE http://wiki.openstreetmap.org/wiki/Ru:Map_Features - NONE/- - ... 1231923817.516 60008 89.16.177.88 TCP_HIT/000 0 PURGE http://wiki.openstreetmap.org/wiki/DE:Map_Features - NONE/- - / Grant _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
