Re: [squid-users] High Utilization

> On Thu, 17 Mar 2005 13:59:57 -0900, Chris Robertson <crobertson@gci.com> wrote:
> > You are seeing peaks of over 20 Mb/sec traffic, from 2500 clients. That's
> > quite a bit for one box to be handling. What kind of requests per second
> > does that translate out to? (Cache Utilization in the cache manager will
> > divulge this information). You might just be hitting the limits of one
> > squid server.

On 18.03 14:54, Jorgen Rosink wrote:
> FYI, we have two Squid parents, both with a seperate outbound
> connection. Half of the child proxy servers have squid1 as primary and
> squid2 as a secondary (fall back), the other half just the opposite.
> Both Squid servers are exactly the same (Hardware&Software), so is
> their performance.

I'd set up them as siblings to each other, and all child proxies should
use both as parents. Children could better select then to use which proxy
(expecially if they support ICP). Why did you disable ICP?

http://rosink.op.het.net/squid/squid.conf: icp_port 0

> > > Box is a Xeon 2.4Ghz with 1GB ram and three dedicated 9GB SCSI cache
>
> > Info.txt shows pretty low hit ratios, so perhaps you could use more disk
> > space, and Squid can easily use more than a GB of RAM (especially if you
> > have lots of disk cache).
>
> A RAM upgrade was already planned, I'll ask for some 18GB disks also...

for 3x9GB disks you have very big mean object size. You defined 16MB max
object size, which is reasonable from my experience. Hmmm.

However I don't know if you get good RAM utilization with:
maximum_object_size_in_memory 16384 bytes

> > You are creating cache digests, but are any of the child
> > proxies using it? Are any of the child proxies capable of bypassing this
> > Squid server (if not, I'm not sure of the utility of advertising what this
> > cache holds).
>
> You're right, digest is bogus, all childs _MUST_ use one of two Squid
> servers, will turn it off...

digest is OK if you can select from which proxy fetch an object.

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