Re: [Xen-users] Oracle on a classic Physical server Win2k3 versusOracle on domU win2k3

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Nov 05, 2009 at 08:49:50AM +0100, Rémi BERNIER wrote:
>    Hi everyone,
> 
>    Bad news...
>    I just test with Xen 3.4.1 modules 2.6.26-6, but the performance are far
>    from being the same quality with a physical server win2k3
>    If anyone have another idea..
> 

You really need to profile _why_ it's slower. you need to measure
exactly _what_ is using the cpu, or causing the slowness.

You need to monitor in dom0 (using "xm top", "iostat 1", etc) and *also*
in the windows guest, using whatever tools windows has.

Also, why aren't you running oracle on Linux? would be a lot easier to
debug..

-- Pasi

>    Rémi
> 
>    Pasi,
>    I just finished the swingbench test with a dedicated CPU but it's the same
>    performance.
>    When i will have time, I will test on Xen 3.4.1
> 
>    On Mon, Nov 02, 2009 at 09:32:59AM +0100, Rémi BERNIER wrote:
>    >    Yes my windows guest is fully CPU but i thought  to have better
>    >    performance regarding the number of transactions per seconds compared
>    a
>    >    Physical server.
>    >    Thanks,
>    >
> 
>    Have you tried pinning the guest vcpus to separate physical cores? And
>    dedicating a separate core for dom0?
> 
>    Also, did you try with Xen 3.4.1 ?
> 
>    -- Pasi
> 
>    >    Rémi
>    >
>    >    On Mon, Nov 02, 2009 at 08:55:40AM +0100, Rémi BERNIER wrote:
>    >    >    James, Pasi,
>    >    >
>    >    >    Yes it's just a swinbench on the performance of transactions on
>    a
>    >    Oracle
>    >    >    database.
>    >    >    But not a network test.
>    >    >
>    >    >    My CPU is Intel(R) Xeon(R) CPU 5130 @ 2.00GHz, when i test with
>    >    >    swingbench, my domU is full cpu (near 197%)
>    >    >    The result of iowait with command: iostat 1  -> %iowait = 0.00
>    >    >
>    >    >    Thanks in advance.
>    >    >
>    >
>    >    Ok so it's fully CPU bound.
>    >
>    >    Then you should measure CPU usage in the Windows guest and figure out
>    >    where all the CPU time goes..
>    >
>    >    -- Pasi
>    >
>    >    >    Rémi
>    >    >
>    >    >    While running the test, run "xm top" in dom0.
>    >    >
>    >    >    How's the cpu usage? are your cpu cores maxed out?
>    >    >    What's using cpu?
>    >    >
>    >    >    Also run "iostat 1" in dom0 (it's in sysstat package), and see
>    if you
>    >    >    have a lot of iowait in dom0..
>    >    >
>    >    >    -- Pasi
>    >    >
>    >    >    >
>    >    >    > I just finished the swingbench test with new drivers
>    (0.10.0.130)
>    >    but
>    >    >    it's the
>    >    >    > same result about 8400 transactions per seconds..
>    >    >    > So if you have an idea, i'm listening to you.
>    >    >    >
>    >    >    > Thanks in advance and good week.
>    >    >    >
>    >    >
>    >    >    Is the swingbench test disk i/o bound? Or network too?
>    >    >
>    >    >    James
>    >    >
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