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  • 1.  iostat display different on my AIX boxes

    Posted Mon January 29, 2007 10:13 AM

    Originally posted by: SystemAdmin


    I have two AIX boxes, both p550 with 5.3L on. the oslevel -g indicates one with actual level is 5.3.0.30, other wih 5.3.0.50. When I run the iostat (no any option), the latest one display the
    System configuration: lcpu=4 drives=5 paths=4 vdisks=0
    tty: tin tout avg-cpu: % user % sys % idle % iowait
    0.0 4.9 1.1 0.6 97.1 1.2
    Disks: % tm_act Kbps tps Kb_read Kb_wrtn
    hdisk0 0.6 17.4 1.7 1920741 6893896
    hdisk3 3.0 483.7 16.4 228104157 17127436
    hdisk2 0.3 54.3 1.4 10818337 16720796
    hdisk1 1.4 68.9 4.1 9307376 25641180
    cd0 0.0 0.0 0.0 0 0
    the older one displays only
    1. iostat
    System configuration: lcpu=4 drives=5 paths=4 vdisks=0
    tty: tin tout avg-cpu: % user % sys % idle % iowait
    0.0 1.3 3.0 0.9 91.9 4.3
    " Disk history since boot not available. "
    What I missed here. I have tried several options, but no one could show me the activities of the disks.
    #AIX-Forum


  • 2.  Re: iostat display different on my AIX boxes

    Posted Mon January 29, 2007 11:29 AM

    Originally posted by: orphy


    Fix this on the 2nd box.

    1. lsattr -Elsys0 -a iostat
    iostat true Continuously maintain DISK I/O history True
    Orphy
    #AIX-Forum


  • 3.  Re: iostat display different on my AIX boxes

    Posted Mon January 29, 2007 01:53 PM

    Originally posted by: SystemAdmin


    1. lsattr -Elsys0 -a iostat
    iostat false Continuously maintain DISK I/O history True
    1. iostat

    System configuration: lcpu=4 drives=5 paths=4 vdisks=0

    tty: tin tout avg-cpu: % user % sys % idle % iowait
    0.0 1.3 3.0 0.9 91.8 4.3
    " Disk history since boot not available. "
    nothing happening. Treid a space between -El sys0, same result.
    #AIX-Forum


  • 4.  Re: iostat display different on my AIX boxes

    Posted Mon January 29, 2007 02:02 PM

    Originally posted by: orphy


    That was to show you if iostat=true or not. You actually have to change it.

    1. chdev -l sys0 -a iostat=true
    Orphy
    #AIX-Forum


  • 5.  Re: iostat display different on my AIX boxes

    Posted Mon January 29, 2007 04:13 PM

    Originally posted by: SystemAdmin


    Does iostat take a lot resource? Because this is a production box, the configuration was setup before I came by IBM contractor. I wonder why it did not set up to true. My other machine is a new one, just set up recently by default. As I know the iostat does not consume too much resource?
    #AIX-Forum


  • 6.  Re: iostat display different on my AIX boxes

    Posted Mon January 29, 2007 09:35 PM

    Originally posted by: orphy


    We enable iostat on pretty much all our boxes (dev, test, prod) and it does
    (why wouldn't it?) incur some overheads but it shouldn't be anything significant.
    I always say that if your box couldn't handle this type of overhead, your box
    is waaaaaaaaay overloaded and enabling iostat wouldn't hurt it much more...

    That said, since this is a production box, you should consider getting some kind
    of change control/management approval before making the change.
    Orphy
    #AIX-Forum


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