Re: [squid-users] Re: Performance

From: Chris Tilbury <>
Date: Fri, 29 Jan 1999 15:15:44 +0000

On Fri, Jan 29, 1999 at 09:18:37AM -0500, Scott Bethke wrote:

> At 12:36 PM 1/29/99 +0100, you wrote:
> >- We use Squid on a Sun Sparc 5 Solaris 2.6 machine. We have 2 * 4 GB
> >cache-disk and 128 MB memory.
> What speed is the 5?? 70? 85? 110? 170?

As importantly, what version of squid? What do you have cache_mem set to?

Have you tuned any of the TCP/IP settings on the machine using ndd yet?
[see the SQUID FAQ, section 14, the Solaris Tuning Section]

Have you loaded the Performance and Tuning toolkit on the machine so you
can run its tools to see where they think the bottleneck lies?

Have you got the latest kernel patch applied? If you have, you should
make sure you have priority_paging turned on.

> >- We have a lot of performance problems. Response to an normal page (in
> >cache = 180 bytes/s). We have an 2 MB connection to the internet. One
> >and a half week ago we had the same problem, cleaning the cache helpt
> >(for a week).
> Slowaris may be to blame, how fast are your drives? do you run the drives
> on a different SCSI controller or just on the built-in controller? Also
> ram looks rather small. For Solaris in this application I'd say 256M is
> the smallest

We have a E250 with 512Mbytes of RAM and ~28Gbytes of cache disk
here. There are 12 separate disks being used to provide the cache,
so we've got a nice large number of spindles. 2600+ users per day,
with over 1.2million requests. This machine is coping fine.

Given that, 256Mbytes memory for an 8Gbyte cache sounds like overkill
to me.

> >- This is a one task machine, only Squid is running
> Have you considered running a faster OS? like NetBSD or OpenBSD?

Before you bin the O/S, make sure you're getting all you can out of
it. There's an _awful_ lot you can do to Solaris to make squid run
better under it. Once you've done it, changing it may seem a
unnecessary step.



Chris Tilbury, UNIX Systems Administrator, IT Services, University of Warwick
EMAIL: PHONE: +44 1203 523365(V)/+44 1203 523267(F)
Received on Fri Jan 29 1999 - 08:14:24 MST

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