IDS Forum

Re: oninit Process in Linux Environment,

Posted By: Martin Fuerderer
Date: Wednesday, 9 February 2005, at 7:46 a.m.

In Response To: oninit Prcess in Linux Environment, (ARVIND PATKAR)

Generally, it

A) depends on what processes you have running.
The number of CPUVP processes and the number of
AIOVP processes can be configured in your $ONCONFIG
file. As has been pointed out by others already,
"onstat -g glo" or "onstat -g sch" will show you,
what currently is running ...

Whether just reducing any (or both) of these will bring
performance benefits is debatable. Generally, tuning is an
incremental process (change one parameter and watch).

B) is pretty normal to have more User CPU time than
System CPU time taken by oninit processes. In fact
User CPU time 10 times of System CPU times is not
unheard of.

Looking at it in detail, this actually is desirable, because
when the User CPU time is high, then the processes are
doing lots of useful work (i.e. handling data, sorting,
computations, etc.). During System CPU time, the
processes are using some system services to get "things"
done (among other things this can be I/O). If this number
gets too high it is "eating away" at the User CPU time which
will eventually lower the overall throughput (e.g. transaction
wise).

Regards,
Martin
--
Martin Fuerderer
IBM Informix Development Munich, Germany
Information Management

A) forum.subscriber@iiug.org wrote on 09.02.2005 10:26:45:

> Hi all,
>
> We are facing a strange problem with oninit process on Linux
Environment, we are seeing around 20 - 40 oninit
> processes, initiated by root (linux SU) and also Informix user
(informix).
>
> Is there any specific reasons why so many oninit processes are getting
invoked.
>
> If there is a process to reduce the oninit proceses on the Linux server,
kindly let us know.
>
> Thanks and regards,
> Arvind.
>

B) forum.subscriber@iiug.org wrote on 09.02.2005 09:53:00:

> Hi All,
>
> We are running Informix Dynamic Server 9.40 FC3 on Red Hat Linux
Enterprise 3 Server environment on HP Itanium
> Server. Informix is using more of User CPU than System CPU. Is it ok
with the system or we need to tune it
> inorder to reduce the usage of USER CPU.
>
> Kindly help me in this regards.
>
> Thanks and regards,
> Arvind. Patkar
>

Messages In This Thread

• oninit Prcess in Linux Environment,
  ARVIND PATKAR -- Wednesday, 9 February 2005, at 4:26 a.m.
  • Re: oninit Prcess in Linux Environment,
    Richard Snoke -- Wednesday, 9 February 2005, at 6:43 a.m.
  • Re: oninit Process in Linux Environment,
    Martin Fuerderer -- Wednesday, 9 February 2005, at 7:46 a.m.
  • Re: oninit Prcess in Linux Environment,
    Madison Pruet -- Wednesday, 9 February 2005, at 9:58 a.m.

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