AIX

 View Only
  • 1.  FC SCSI Adapter Driver Information

    Posted Mon June 15, 2020 10:35 AM
    Dears ,

    from the nmon analyzer i can see the below which is related to FC adapters , this values should be (0) , what  is the recommendation 

    thank you 

    FC SCSI Adapter Driver Information

      No DMA Resource Count

    2887124

      No Adapter Elements Count

    0

      No Command Resource Count

    7896



    ------------------------------
    Anas Al-Saleh
    ------------------------------


  • 2.  RE: FC SCSI Adapter Driver Information

    Posted Tue June 16, 2020 06:50 AM
    Hi Anas,
    With all nmon or nmon analyser, nmonchart etc. questions the AIX version would be useful
    Specifically, the output of: oslevel -s 
    If on Linux cat /etc/*ease

    Next what is the actual nmon command you are running?

    In this particular case, I have had to search old nmon files for these specific output.
    This appears in the nmon sections documenting your current configuration.
    The data is collected by running common AIX System Admin commands.

    So the issue is not nmon analyser and not nmon.
    These numbers should be found from you running the commands on the command line.
    Try:  lsdev | grep fcs
    then for each fcsX run: fcstat -D fcs0

    These are counters for events on your system in the kernel or this case the device drivers for FC.
    They should get zero-ed on reboot.

    If the numbers are not rising then you don't have a problem, so just ignore them.

    I don't know of a command to zero these kernel internal stats.  Zeroing them might not be possible.
    If you really must zero them, you will need to raise a PMR.
    Or as I suspect you have lots of advanced nmon option switched on then remove the FC stats options :-)

    Better yet stop saving possible 1000's on nmon files and running the nmon analyser all day long
    - start sending the data directly to a Time-Series database using my new tool njmon & nimon :-)

    Cheers, Nigel



    ------------------------------
    Nigel Griffiths
    ------------------------------



  • 3.  RE: FC SCSI Adapter Driver Information

    Posted Mon July 13, 2020 10:47 AM

    The recommendation is not to overload the cards.

    This can occur if the sum of disk queues exceeds the card queueus, or if the sum of the VFCs queues exceeds the the physical card queues.

    Old versions of the VIOS had extremely limited values.



    ------------------------------
    José Pina Coelho
    ------------------------------