Hi Steve, If you are going to debug squid, you should take a look at this page: http://wiki.squid-cache.org/KnowledgeBase/DebugSections. It describes all the debug sections. You can specify the sections and the debug level for each one with something like: debug_options ALL,1 85,3 88,3 22,5 Level 3 provides enough debug info without overwhelming you with unrelated details. IMO, it's a good idea to start with the sections 85, 88 and 22 @ level 3. Regards, Anatoli -----Original Message----- From: Steve Hill [mailto:steve@xxxxxxxxxxxx] Sent: Tuesday, April 15, 2014 06:53 To: squid-users@xxxxxxxxxxxxxxx Subject: Debugging slowness I'm trying to debug some slowness issues with Squid 3.4.4. This is currently under reasonably light use and every so often it becomes very slow. >From what I can tell, the client sends a request with Negotiate auth credentials in it. The proxy should respond with a 407 and the negotiate challenge, but instead it sometimes just sits there for ages... sometimes for a minute or so! (I'm not 100% convinced that this is specific to Negotiate auth though). Squid does not appear to be running out of file descriptors. The problem is intermittent, which is making debugging a pain. I have a tcpdump running and full logging turned on in squid so hopefully I can catch some useful information the next time the problem occurs. My question is: Once I've identified a specific request that has experienced the problem, and want to track what Squid was doing with that request, is there any sensible way of filtering the cache.log to exclude the other requests that were happening concurrently? Secondly, does anyone have any suggestions for what specific logging I should turn on, rather than logging everything, since logging everything slows the proxy down significantly? Thanks. -- - Steve Hill Technical Director Opendium Limited http://www.opendium.com Direct contacts: Instant messager: xmpp:steve@xxxxxxxxxxxx Email: steve@xxxxxxxxxxxx Phone: sip:steve@xxxxxxxxxxxx Sales / enquiries contacts: Email: sales@xxxxxxxxxxxx Phone: +44-844-9791439 / sip:sales@xxxxxxxxxxxx Support contacts: Email: support@xxxxxxxxxxxx Phone: +44-844-4844916 / sip:support@xxxxxxxxxxxx
