ionice on AIX

Posted on 2011-05-10
Last Modified: 2013-11-17
Hi, simple question..

is there ionice or similar command on AIX?

I want to give priority to process to access to disks on AIX. I've used ionice on DomU's on linux. I need it now for AIX.

Question by:sminfo
    LVL 68

    Expert Comment


    AIX has the regular commands nice and renice, but not ionice.

    See "man nice" and "man renice"

    You can tuneI/O on AIX in general using the "ioo" command, but not on a per-process basis.

    Here is an informative article about AIX's process priority and control:

    If you really need to fine-tune single processes consider using the AIX Workload Manager.

    Here is more:



    Author Comment

    Hi wmp,

    I just want to run an mksysb on an old Power server and I want not to use the whole IO. It's a shame, I thought there was ionice similar cmd on AIX. Any idea on how to run my mksysb?

    Author Comment

    How can I see the nice's priority of process with ps command?

    Author Comment

    Opss. ps -elf ... sorry! :-)
    LVL 68

    Accepted Solution

    Yes, "ps -elf", the "NI" column ...

    or "ps -eo user,pid,nice,args"  (more output fields if needed).

    As for the mksysb - nice should have some influence on I/O behaviour, but creating a WLM class is the most effective (and sophisticated) way here.

    Start with "smitty wlmaddclass", then continue with "smitty wlmclass_bio" for your new class, fine-tune with "smitty wlmclass_proclimit", finally create a rule to assign mksysb to this class with "smitty crewlmrs".

    Have fun - learning a new feature is always a challenge (will keep you agile ...)

    Just joking: wmp


    Author Closing Comment

    Thanks wmp  :-)

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