[CentOS] Re: how can I stress a server?

Scott Silva ssilva at sgvwater.com
Wed Nov 19 00:52:45 UTC 2008

on 11-17-2008 11:36 PM Rudi Ahlers spake the following:
> On Tue, Nov 18, 2008 at 9:27 AM, Rudi Ahlers <rudiahlers-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
>> On Tue, Nov 18, 2008 at 9:19 AM, John R Pierce <pierce-BRp9yk6zKL1Wk0Htik3J/w at public.gmane.org> wrote:
>>> Rudi Ahlers wrote:
>>>> Hi all,
>>>> I have a server, with an Intel DG35EC motherboard, Q9300 CPU, 8GB
>>>> Kingston DDRII RAM which can't take a lot of load. I have 4 XEN VPS's
>>>> on there, which doesn't consume more than 4GBM RAM at this stage. Yet,
>>>> the machine sky rockets at some times. I've moved the XEN VPS's to
>>>> another server, with 4GM RAM, and it doesn't cause the same problems.
>>>> So, apart from memtest86 how else can I stress test the server to find
>>>> out what the problem is?
>>> 4 instances of mprime (www.mersenne.org), running the torture test, each set
>>> to affinity on a different CPU.
>>> and, next time get a real server board with ECC.
>>> _______________________________________________
> John, just cause the machines we use to serve web content to our
> clients doesn't use the grade of equipment you prefer to use, and can
> afford, doesn't mean equipment that other people use is inferior, or
> worthless.
> I have a problem with one of my machines, and have narrowed down that
> it could either be the CPU, RAM or motherboard, but before I take it
> back to the suppliers, I need to know what is wrong. They will switch
> it on, and see that it works. But it's not taking the load that I
> expect it could. In fact, it's not taking the same load as a machine
> with a Intel E6750 Core 2 Duo & 4GB RAM. This server should be 2 - 4
> times faster & handle 2 - 4 times the load of the E6750, yet it
> doesn't and I need to know why. I don't appreciate being told that the
> hardware I have if inferior.
Does the board recommend a certain memory config? I have had systems that
specify a ram module down to the part number, and others just don't work the
same. Some boards can be real picky, and also some boards don't have enough
heat sync on their supporting chips and need a little extra ventilation.

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