Re: Async_io set up HP-UX for 10g Instances(these are apps instances)
- From: amonte <ax.mount@xxxxxxxxx>
- To: "edwin devadanam" <edwin_kodamala@xxxxxxxxx>
- Date: Fri, 3 Aug 2007 09:50:24 +0200
You have already being told. You gain nothing if the operating system does
not support Asycnhronous I/O
Alex
On 8/2/07, edwin devadanam <edwin_kodamala@xxxxxxxxx> wrote:
>
> okay if i want to change disk_asynch_io = TRUE ...on what basis i can
> change...i mean
> what advantages!
> Thanks,
> Edwin.K
>
> *amonte <ax.mount@xxxxxxxxx>* wrote:
>
> Read *Note:139272.1*
>
> and you can see as LSC already pointed out
>
> on HP-UX,
> aio is *only* possible on a raw device. Put in another way, aio *cannot* be
> used on a filesystem.
>
>
> Quite clear
>
>
> On 8/2/07, edwin devadanam <edwin_kodamala@xxxxxxxxx> wrote:
> >
> > Cheng,
> >
> > the raw files system is for solaris server.
> >
> > We are using normal Filesystem.
> > Already Async io is set in couple of other HP-UX servers........
> >
> > on what basis can we change disk_asynch_io = FALSE to
> > disk_asynch_io = TRUE (PLease see below information for clarity of my
> > requirement)
> >
> > Any docs pertaining to disk_asynch_io = TRUE and its Advantages
> >
> > Thanks,
> > Edwin.K
> >
> > *LS Cheng < exriscer@xxxxxxxxx>* wrote:
> >
> > You need to setup raw devices to use AIO in HP-UX. No chance if you are
> > using vxfs.
> >
> > Thanks
> >
> > --
> > LSC
> >
> > On 8/2/07, edwin devadanam < edwin_kodamala@xxxxxxxxx> wrote:
> > >
> > > Hi
> > >
> > > We have this setup
> > > db_writer_processes = 4 disk_asynch_io = false
> > >
> > > I have doubts whether i can set the below on....
> > > please suggest advantages and disadvantages of below setting.......on
> > > HP-UX
> > > disk_asynch_io = TRUE
> > > tape_asynch_io = TRUE
> > >
> > > am unclear mainly about
> > > disk_asynch_io,db_writer_processes,DBWR_IO_SLAVES
> > >
> > > Any help would be appreciated.
> > >
> > > Regards,
> > > Edwin.K
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