Re: Squid cache size

I used to run a filtering cache, using a shell script for the filter, and
a large list of urls, on a sparc 1+ w/24M, and 1 external 669M disk. It
served about 30 users, happily, albeit with a small cache size. (about
200M). We got a reasonable hit rate, though the machine was really for the
filtering part of the job. The machine never seemed to be at capacity, cpu
load was 25-30%, but for more users, I'd have liked to put a faster disk
on. That was with Sol 2.5.1, I believe 2.6 is faster.

--
ian
On Thu, 4 Feb 1999, David J Woolley wrote:
> Date: Thu, 4 Feb 1999 14:37:50 +0000
> From: David J Woolley <djw@bts.co.uk>
> Reply-To: squid-users@ircache.net
> To: squid-users@ircache.net
> Subject: Re: Squid cache size
> Resent-Date: Thu, 4 Feb 1999 07:19:47 -0800 (PST)
> Resent-From: squid-users@ircache.net
> 
> > Anyone can recommend me proper sizes for cache disc and mem?
> > >From the docs I find out only that I need 5M of memory for each gigabyte
> > of cache.
> > The configuration is a PII/300MHz with 64M of RAM and 2 IDE HDD of about 4
> > GB each.  I currently serve 10 PC but I'd like to know like how much space
> > is suitable for each additional PC.
> 
> That question is essentially unanswerable as it depends on how your 
> old and new users use the web.  If they are all accessing the same 
> pages, virtually no extra space is needed.  If they are mainly 
> accessing dynamic content, the cache may not be useful, etc.
> 
> For reference, a 486 SX 33 here, with 200MB of cache disk and 32MB of 
> memory seems to be able to support around 30 users in our company, 
> with no signs of distress (20 - 25% CPU load) and a cache lifetime of 
> about 10 days.  It's currently using 18MB of memory, with a 
> configured memory cache of 8MB and has 23,000 objects cached.
> 
> If your users have the same profile as ours, I would suggest that you 
> need to greatly reduce the specification of the machine!
> 
> The only performance pluse we have is that the disks are SCSI, 
> although you could probably get as good performance by making sure 
> your two disks are on different interfaces (hda and hdc in Linux 
> terms).  Really, though, your number of users doesn't require great 
> performance.
> 
> 
> -- 
> David Woolley - Office: David Woolley <djw@bts.co.uk>
> BTS             Home: <david@djwhome.demon.co.uk>
> Wallington      TQ 2887 6421
> England         51  21' 44" N,  00  09' 01" W (WGS 84)
> 
> 
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