System Cpu Between 50-70% and need to find out why

[Chris]

On 29/05/07, Paul <bsdlist at cogeco.ca> wrote:
> At 04:45 PM 28/05/2007, Chris wrote:
> >On 28/05/07, Paul <bsdlist at cogeco.ca> wrote:
> >>
> >> >
> >> >I will run tests on a local box but I cant be toggling the kernels on
> >> >my production servers.
> >> >
> >> >Thanks
> >> >
> >> >Chris
> >>
> >>Hi Chris,
> >>
> >>So have you removed the QUOTA feature from your production boxes? I
> >>am curious what you did here to get things working on the stable 6.2?
> >>
> >>I am amazed more people are not having an issue with this.
> >>
> >>Thanks
> >>
> >>Paul
> >>
> >no I use QUOTA but put up with the performance hit, all my production
> >servers are dual core now and new ones will be core 2 duos so I work
> >round it with raw power, also using SATA hds instead of PATA.  I dont
> >use QUOTA on every single server tho, just the commercial web servers.
> >
> >Chris
>
> Thanks for your reply.
>
> That is odd as I used two Dual Core CPUS (4 in total) XEON 64 with 16
> GIG of RAM and SATA HD on the amd64 branch with a very fast Areca
> controller and the hit was so bad that the system was not usable at
> all. It was like going back to a 386 (or beyond that).
>
> Did you provide any mail services on that server? I have a hunch it
> was the multiple instant access to many files that was causing the
> slowdown (50-100 of small file reads and writes per second). If you
> only provided FTP type access then that may not have been as big of
> an issue as you may not have had as many concurrent file writes.
>
> Thanks
>
> Paul
>
>

email/www/ftp all provided using a commercial control panel solution
to manage it all, but the commercial servers are a mix of light to
medium users and I dont think anyone is stressing the email systems a
lot, they all do anti spam and anti virus as well on emails.

I have one server that is very heavy usage but has QUOTA disabled as
its dedicated to one domain only and not needed to use hd quotas.

Chris