Be aware that if you use varies, you must purge all potential combinations (for example, variations on Accept-Encoding) individually when using `set obj.ttl = 0s`. I believe Varnish 2.1 now has a thread to process the purge list and prevent it growing out of hand.
Laurence On 18 May 2010 15:41, Sam Crawford <[email protected]> wrote: > Scott, > > Thanks for that, I'll experiment with that and see how we fare! > > Regards, > > Sam > > > On 18 May 2010 15:19, Scott Wilson <[email protected]> wrote: >> Hi Sam, >> >> On 18 May 2010 10:47, Sam Crawford <[email protected]> wrote: >>> Morning all, >>> >>> A bit of a newbie question I fear... We've been successfully running >>> Varnish 2.04 for over a year now on our intranet, and have found in >>> the past two days that our instances in one particular region are >>> eating up a lot of system memory. We've upgraded to 2.06 a couple of >>> days ago, and are still experiencing the same issue. >>> >> >>> n_purge 246879 . N total active purges >>> n_purge_add 252285 5.61 N new purges added >>> n_purge_retire 5406 0.12 N old purges deleted >>> n_purge_obj_test 245731 5.46 N objects tested >>> n_purge_re_test 214813964 4773.11 N regexps tested against >>> n_purge_dups 3227 0.07 N duplicate purges removed >>> hcb_nolock 0 0.00 HCB Lookups without lock >>> hcb_lock 0 0.00 HCB Lookups with lock >>> hcb_insert 0 0.00 HCB Inserts >>> esi_parse 0 0.00 Objects ESI parsed (unlock) >>> esi_errors 0 0.00 ESI parse errors (unlock) >>> >> >> It looks to me like you're generating an awful lot of purge list >> entries. We struggled for a long time with this problem before >> abandoning purge in favour of setting object TTLs to 0. See this FAQ >> entry: >> >> http://varnish-cache.org/wiki/VCLExamplePurging >> >> The problem we were having was that we were using purge to implement >> force-refresh functionality, but there are so many badly behaved >> crawlers and other clients out there that send always send the NoCache >> header that the purge list would swamp all available resources. >> >> Hope that helps! cheers, >> scott >> > > _______________________________________________ > varnish-misc mailing list > [email protected] > http://lists.varnish-cache.org/mailman/listinfo/varnish-misc > _______________________________________________ varnish-misc mailing list [email protected] http://lists.varnish-cache.org/mailman/listinfo/varnish-misc
