On fre, 2008-06-06 at 14:38 -0700, leongmzlist wrote: > My cache performance is acting strange; I'm getting extremely high > tcp_hit times for cached objects: > > 1212787643.465 50343 10.2.7.22 TCP_HIT/200 19290 GET http://cache-int/.... > 1212787737.740 15212 10.2.7.25 TCP_HIT/200 11511 GET http://cache-int/.... > > > Those high times comes in bursts. Eg: bunch of high response time > will come followed by a normal response times. Normal response times > are sub 100ms Could be cache validations. Some times TCP_HIT is logged when it really should have been TCP_REFRESH_HIT. This can happen if the object uses Vary if I remember correctly. Another possibility is if the Squid serer is swapping, causing Squid to delay everything waiting for swap activity. A third possibility is if you have ACLs which may cause delays, such as DNS dependencies or external acl lookups. Regards Henrik
