RE: [squid-users] Performance problems - need some advice

> -----Original Message-----
> From: Gregori Parker [mailto:gregori@playstream.com]
> Sent: Tuesday, February 07, 2006 2:36 PM
> To: Squid ML
> Subject: RE: [squid-users] Performance problems - need some advice
>
>
> Yes, please keep it on the squid-list...I for one am
> interested in this thread.
>
> I just deployed 3 squid servers in a similar configuration
> (reverse-proxy serving large media files)...except each
> server of ours is dual 3Ghz Xeon, 64-bit everything, 4GB RAM
> and around a TB each of dedicated cache space (aufs on ext2
> with noatime option). They are running Squid 2.5 STABLE12 on
> Fedora Core 4 x86_64. Disk performance looks fine to me, but
> I'm concerned because top reports that squid is averaging 70%
> cpu usage most of the time.
>

Look into the epoll patch (http://devel.squid-cache.org/projects.html#epoll). It's not "production ready", (or even supported AFAIK) but it did WONDERS for my CPU usage on Linux. Anecdotal "evidence" points to it being very stable. My proxy (not accelerator) server (~60GB/day, 2MB/sec and 160req/sec peaks) has been running it for 4 days, 16 hours and 34 minutes of CPU time over 107 real days without incident. Here is some less anecdotal evidence: http://www.squid-cache.org/mail-archive/squid-users/200504/0422.html YMMV and all that good stuff.

> Can anyone recommend techniques for assessing squid
> performance? I have no good way of benchmarking our clusters
> since SNMP isnt ready quite yet. Please don't mention
> cache_mgr, thanks :)
>  
>

Chris
Received on Tue Feb 07 2006 - 17:57:17 MST