[HPADM] SUMMARY vmstat id negative value

From: Keenan, Greg John (Greg)** CTR ** (gjkeenan_at_lucent.com)
Date: 06/10/05

  • Next message: Marc Thoelen: "[HPADM] 'auto-recycling' of logs etc. in HP-UX" 
    To: "'hpux-admin@dutchworks.nl'" <hpux-admin@dutchworks.nl>
Date: Fri, 10 Jun 2005 16:14:04 +1000

    Found the answer in O'Reilly System Performance and Tuning:

    ..."vmstat tries to present an average since boot on the first line. The
    first line of vmstat output is utter garbage and must be discarded"

    I was only running vmstat for a single count. When run with mutiple counts
    the stats after the first line are reported accurately.

    >Got a couple of 10.20 boxes where vmstat reports a negative number in the
    id
    >field. Sar reports the correct values i.e. normally > 95% idle. 

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