[squid-users] ~5% of cache hits very slow

Hi,

I'm running Squid (2.5 STABLE 12) in a reverse proxy setup, caching
mostly dynamic content with unreadably long parameterized URLs. Most
cache hits take about 2 - 4 milliseconds (as indicated by the access
log), but I see frequent outliers in the 200 - 800 millisecond range.
These seem to be mostly TCP_HIT and TCP_IMS_HIT cases, not cases where
Squid connects with an origin server. This is on a very lightly loaded
test server. There is no fancy authorization happening. Are there any
well known configuration issues that could be causing this? Even if the
hits are on disk rather than in memory, the TCP_IMS_HIT case should only
need to consult an in-memory index structure and reply with a 304, right?

Thanks,
Ben
   
Received on Tue Dec 05 2006 - 16:31:15 MST