Re: [squid-users] Squid CPU Performance

Henrik

>> b) Squid is the worst case application for RAID5 and will absolutely
kill
>> the performance of a RAID5. RAID1 is fine, and so is separate drives.

Do you mean both hardware AND software Raid-5? What's the issue?

Jeff

--
Jeff Richards
Technical Consultant
Unix Enterprise Services
jeff.richards@centrelink.gov.au
Tel: +61 2 6219 8125
                                                                                                                                     
                      Henrik Nordstrom                                                                                               
                      <hno@squid-cache.        To:       Mark Pelkoski <mpelkoski@mpccorp.com>                                       
                      org>                     cc:       squid-users@squid-cache.org                                                 
                                               Subject:  Re: [squid-users] Squid CPU Performance                                     
                      22/11/2003 10:14                                                                                               
                                                                                                                                     
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Some notes:
a) Squid is a single process application and can not make use of SMP. If
you want to make Squid benefit from a SMP system you will need to run
multiple instances of Squid and find a way to distribute your users on the
different Squid instances just as if you had multiple Squid boxes.
b) Squid is the worst case application for RAID5 and will absolutely kill
the performance of a RAID5. RAID1 is fine, and so is separate drives.
Regards
Henrik
On Fri, 21 Nov 2003, Mark Pelkoski wrote:
> List,
> I FINALLY implemented a Squid server into my production environment
> today. It is squid-2.5.STABLE4-20031029 on a Quad Proc Xeon 500MHz with
> 1M Cache and 3x9Gig Raid-5 dedicated for cache and 2x9Gig Raid-1 for OS
> Redhat 9.0. I tested this exact server config with 74 users and
> performance was pretty good for 800 Reqs/Min. Now in Production I have
> 325+ users at 2700 Reqs/Min and performance stinks. It's like being on a
> dial-up connection. 3 of the procs are sitting below 1%. The other is
> used by Squid at 99.9%. It there any way to speed up performance on a
> multi-proc system? TIA.
>
> Mark Pelkoski
>
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