Re: Reduced java/tomcat performance 6-beta3 -> 6-stable ?

From: Kris Kennaway (kris_at_obsecurity.org)
Date: 11/28/05

  • Next message: Eirik Øverby: "Re: Reduced java/tomcat performance 6-beta3 -> 6-stable ?" 
    Date: Mon, 28 Nov 2005 16:14:40 -0500
To: Eirik ?verby <ltning@anduin.net>

    On Mon, Nov 28, 2005 at 09:54:30PM +0100, Eirik ?verby wrote:
    > Hi,
    >
    > I think I have found the culprit. There must be some sort of
    > difference between the machines after all (BIOS revision?), because
    > while on one machine the interrupt rate for the bge card stays very
    > low (2 to be exact) during maximum load, the other machine goes
    > beyond 1000 and keeps rising constantly. This might also explain why
    > performance slowly degrades over time on that machine, and response
    > times vary wildly, while the "fast" machine responds nicely within
    > 1-2 seconds no matter the load and testing time.
    >
    > I will have to investigate this more closely. Is there a way to force
    > the NIC to polling mode (I'm assuming that is the difference, an IRQ
    > rate of 2 is too low for a heavily loaded server if the NIC is
    > interrupt-driven)?
    >
    > Anything else I could look at?

    BIOS update.

    Kris

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