Re: Async_io set up HP-UX for 10g Instances(these are apps instances)

From: Kirtikumar Deshpande <kedeshpande_at_yahoo.com>
Date: Wed, 8 Aug 2007 04:54:59 -0700 (PDT)
Message-ID: <950895.4915.qm@web51806.mail.re2.yahoo.com>

If the /dev/async file exists (for whatever reason), then you won't see those trace files.
Also, there is no error reported if d_a_i is left to TRUE. It just creates those pesky trace files. I have seen those files and had to change d_a_i on our HP boxes as we chose not to create /dev/async file.

Regards,

• Kirti
  • edwin devadanam <edwin_kodamala_at_yahoo.com> wrote:

> In one of our recently(almost a month) upgraded apps instance from 9.2.0.5 to
> 10.2.0.2,we left disk_async_io=true but we dont get any errors related to
> note:394870.1,though i believe and as discussed that HP-UX(jfs) doesnt have
> asynchronous I/O.
> still today its set as disk_async_io=true!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>
> isnt this note puts us in little confusion?
>
> Regards,
> Edwin.K
>
>
> Kirtikumar Deshpande <kedeshpande_at_yahoo.com> wrote:
> I am not sure, if anyone mentioned ML#394870.1.
> In 10.2.0.2+ on HP-UX PA-RISC - Disk Aynch I/O is enabled by default (or mistake).
> If /dev/async file is not found (most likely not), you will see a number of little
> trace
> files with a message stating as such. DISK_ASYNCH_IO must be manually set to FALSE to
> stop the generation of these trace files.
>
> Regards,
>
> - Kirti
>
> --- LS Cheng wrote:
>
> > Simulate, not AIO!
> >
> >
> > Thanks
> >
> > --
> > LSC
> >
> >
> > On 8/6/07, edwin devadanam wrote:
> > >
> > > Cheng,
> > >
> > > metalink note: 47328.1 says:
> > > If you set DISK_ASYNCH_IO to false, then you should also set
> > > DBWR_IO_SLAVES to a value
> > > other than its default of zero in order to simulate asynchronous I/O.
> > >
> > >
> > >
> > > Regards,
> > > Edwin.K
> > >
>
>
>
>
>
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Received on Wed Aug 08 2007 - 06:54:59 CDT