Re: [squid-users] Performance problems with 2.6.STABLE18

On Wed, Dec 17, 2008 at 4:24 PM, Mark Kent <mkent_at_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
Received on Wed Dec 17 2008 - 21:49:52 MST