Dnia Czwartek, 18.11.2010 o 11:18 Amos Jeffries napisał: > Okay. The obvious config reasons for slowness are gone. So the next > thing is to find out exactly what Squid is doing. > > * you can check with strace to see whats the thing taking out the CPU.
Not possible, when I run strace load groving wery fast, and i can't do anything. > > Has the box started using swap memory space now? That can drastically > slow downs Squids index lookups or buffering of information relayed. No, on server are about 2 gb free ram (cached). > > Is RAID still running trying to duplicate the random cache IO actions? No, i remove raid, and create two cache_dir: cache_dir aufs /var/spool/squid-cache/cache 10000 60 100 cache_dir aufs /var/spool/squid-cache/sda6/cache 10000 60 100 > > Have you noticed if the problem appears and lasts for around 2 hours, > then goes away? that would indicate your DNS TTL overrides forcing squid > to try the wrong IPs for some site. CDN hosted sites (eg akamai and > youtube) can change their IPs with no notice when there are routing > problems to work around. The problem appears about 30 min - 1 h. I have local dnscache. I have one new information - when i decrease maximum_object_size from 100M to 20 M, squid work for two days without any problem, and then squid again get a lot of cpu. With 100M maximum_object_size squit work stable only for first fiew hours. -- Michał Prokopiuk http://www.sloneczko.net
