#3 NMON disk service time discrepancy

v1.0 (example)
closed
nobody
None
9
2016-01-07
2012-10-11
M_M
No

Comparing NMON disk service time data with sar and collectl. sar and collectl numbers are in agreement. however NMON data is significantly inflated.
This appears only to be happening with the time measurements i.e. seconds per operation type metrics. the operation per second type metrics seem to be in agreement.

NMON capture file is attached along with collectl output for corresponding period.

Discussion

  • M_M

    M_M - 2012-10-11

    Output from collectl covering same period scoped to a particular device: dm-5

     
  • M_M

    M_M - 2012-10-11

    Image showing the problem

     
  • M_M

    M_M - 2012-10-11
    • priority: 5 --> 9
     
  • M_M

    M_M - 2012-10-11

    This seems like a fundamental error so upping the priority.

     
  • Nigel Griffiths

    Nigel Griffiths - 2016-01-07

    This relates to an ancient nmon version, and I have tried to get the data right and I am trying to close bugs.
    If you have this problem with nmon version 16b or later please reopen or raise a fresh bug.
    Thanks Nigel

     
  • Nigel Griffiths

    Nigel Griffiths - 2016-01-07
    • status: open --> closed
    • Group: --> v1.0 (example)
     

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