2008/12/17 Mark Kent <mk...@messagelabs.com>: > I tried running under valgrind, and it found a couple of leaks, but I'm > not sure that those are strictly the problem. If it were a "traditional" > memory leak, where memory was just wandering off, I don't quite see why > the CPU would climb along with the memory usage.
Grab oprofile and do some digging? Adrian > > Mark. > > > > -----Original Message----- > From: Kinkie [mailto:gkin...@gmail.com] > Sent: Wednesday, December 17, 2008 4:50 PM > To: Mark Kent > Cc: squid-users@squid-cache.org > Subject: Re: [squid-users] Performance problems with 2.6.STABLE18 > > On Wed, Dec 17, 2008 at 4:24 PM, Mark Kent <mk...@messagelabs.com> > wrote: >> >> Hi, >> >> I'm currently having a performance issue with Squid 2.6.STABLE18 >> (running on RHEL4). As I run traffic through the proxy, the memory >> grows steadily, and apparently without limit. This increase in memory >> usage is coupled with a steadily growing CPU usage, up to a point at >> which a single core is saturated (97% usage at ~400MB of RSS). At this > >> point, the latency of requests increases. When the load is taken off >> the proxy, the CPU returns to minimal usage, but the memory usage >> sticks at the high water mark. > >> I should point out that I'm using squid for authentication only (HTTP > >> digest), not for caching. Consequently, I have maximum_object_size and > >> maximum_object_size_in_memory both set to 0 in the squid config file. >> My understanding is that this should be sufficient to stop squid from >> caching. >> >> There's plenty of spare physical RAM on the machine, so it seems >> unlikely that it's a memory shortage causing the performance problem. >> My interpretation is that something has gotten too large for Squid to >> handle but, without object caching, it's not clear to me what that >> might be. I would blame the authentication cache, but there's only >> 2000 different users. >> >> Does anyone have an idea what might be going on, and how to fix it? > > There may be a memory leak somewhere.. > Squid 2.6 is rather old, can you try upgrading to the last 2.7 STABLE > release? > > > Kinkie > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > >
