[kerne idle] HIGH

From: Sdrolias Aristotelis (ASdrolias_at_cosmote.gr)
Date: 07/28/04

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    Date: Wed, 28 Jul 2004 18:15:48 +0300
To: tru64-unix-managers@ornl.gov

    Hi all,

    OS: tru64 5.1

    Main question is the following:
    Is it possible high %CPU time of [kernel idle] process to slow down the execution of other processes and generally result to poor performance of the system?

    Situation:
    We are experiensing here poor performance on some processes which are more sleeping than executing on CPUs when the number of CPUs are enough (and 70% idle), and memory is enough. Processes are connecting, retreiving data from oracle, computing and writing back to oracle and filesystem.
    So, there is a possibility that oracle or filesystem might be the bottleneck.
    But appart from this, is it possible high %CPU time of [kernel idle] process to slow down the execution of processes?
    [kernel idle] process has on our system %CPU time 65% on average.
    Is there a possibility that this is causing the problem?. If yes, how can I find what is the exact cause of the problem?
    I have seen many tru64 system and this is the only one with such a big CPU time on [kernel idle] process.
    What might be causing this behaviour? any ideas?

    Kind regards,
    Aristotle Sdrolias
    Software & system Engineer.
    Email: asdrolias@cosmote.gr

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