Hi all, thanks for your responses... versions - I use the standard ones with Debian squeeze (2.7.stable9 and 3.1.6) Yes there are lots of helpers - 25 NTLM helpers and 10 squiduguard helpers, so this could account for slow reconfig. Upgrading to 3.2 seems like a good bet - are there ready-rooled squid 3.2 debs available for Squeeze or do I have to make my own? We currently run squid in 3 different flavours of authentication - NTLM for PCs, ident for macs and digest for guest network, so have 3 distinct squid setups running on our proxy server. Would it be worth setting these all up as non-caching, then set up a parent caching server, or will setting them up as cache peers make them share their caches at all? cheers Jim UK On 2 July 2012 14:44, Marcus Kool <marcus.kool@xxxxxxxxxxxxxxx> wrote: > Squid reconfigure can indeed take a long time. Especially when Squid > uses lots of memory and starts helpers. Starting helpers takes a > large amount of kernel resources when Squid is large, e.g. 2+ GB > since it forks itself and replaces its copy by a new process. The > fork can take a long time. If you use a URL rewritor you can > easily have 24 or more of them and this makes 24 copies of a large > process. > > How large is squid ? > Can you post the output of > ps -o pid,stime,sz,vsz,rss,args -C squid > > I wrote a test program to test the performance of forking X times > a large process. I can post it if you are interested. > > Marcus > > > > On 07/02/2012 05:08 AM, Mr J Potter wrote: >> >> Hi all, >> >> Does anyone have any tips on how to fix this issue: >> >> We've just moved to squid3 from squid2, and now when we do squid3 -k >> reconfigure we get about 30 seconds of squid refusing/failing to >> forward requests while it rejigs itself. I don't know if this is >> squid3 rescanning the cache or doing something with squidguard (we >> have a fairly complex+large squidguard setup)? I don't think this >> happened with squid2. >> >> What can we do to make this less noticeable? >> >> - make it reconfigure faster? >> - multiple squid servers - can we do failover somehow (either proxy >> DNS record points to them both, or they automatically redirect (is >> this what cache peers are for?))? >> - go back to squid 2 - I didn't see any end user benefits of squid3 >> over squid2... >> >> any help would be greatly appreciated. >> >> thanks >> >> Jim Potter >> UK >> >> >
