RE: [squid-users] Cache performance

True, but I recommend it, especially for the OS processing the disk I/O,
and authenticators, etc, but it's not really a requirement.

---------------------------------------------
Chad E. Naugle
Tech Support II, x. 7981
Travel Impressions, Ltd.
 

>>> "Bradley, Stephen W. Mr." <bradlesw_at_muohio.edu> 12/17/2010 11:44 AM
>>>
I would normally agree but until Squid fully implements SMP what would
havin
________________________________________
From: Chad Naugle [Chad.Naugle_at_travimp.com]
Sent: Friday, December 17, 2010 10:12 AM
To: Marcello Romani; squid-users_at_squid-cache.org
Subject: Re: [squid-users] Cache performance

I would also highly recommend using at least a Dual Core CPU, 1.6GHz +
for 200 users. CPU performance is also a very important factor for
user
volume.

---------------------------------------------
Chad E. Naugle
Tech Support II, x. 7981
Travel Impressions, Ltd.

>>> Marcello Romani <mromani_at_ottotecnica.com> 12/17/2010 10:01 AM >>>
Il 17/12/2010 11:09, benjamin fernandis ha scritto:
> Dear Friends,
>
> I m going to use squid for cache purpose only.And i heard that for
> squid cache performance i have to use good RAM and HDD.I have 4gb
RAM
> and 160 GB SATA HDD.And i have 200 users' network.So please suggest
me
> the same.Means can i go with this H/W specification or is there any
> suggestion....Please friends, suggest me .....And in this server i m
> using only squid for cache gain....so also suggest me for RAM also.
>
> And one more thing, for better disk performace should i have to go
> with raid 0 or any other suggestion.....
>
> And what are the main squid configuration parameter for cache
gain....?
>
> thanks,
> Benjo j.

I'm no expert but what you have to avoid is having the squid process
swap. So following the rough rule of 10MB of RAM for each GB of cache
I'd try first with a 100GB cache, which would require 1GB RAM just for

managing it. I'd keep cache mem low, like 128M. The rest of RAM would
be
used by OS for disk cache and buffers. Mount the cache dir with
noatime

option to avoid unnecessary disk accesses. To increase performance,
use

multiple cache_dir, each pointing to its own physical disk. Avoid raid

if you need performance.

That said, I don't want to sound rude, but I think your questions show

that you should do some research on your own first. Please search the
mailing list archives and the squid site. Many general questions about

squid performance and configuration can be solved just by reading
those

docs and following the links.

For a start:

http://wiki.squid-cache.org/SquidFaq/ConfiguringSquid

HTH

--
Marcello Romani
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