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

I am sorry to say but in HP-UX you must use Raw Devices in order to use AIO. And Raw Devices is not specific for Solaris!

You can set disk_asynch_io to whatever value you like but if the underlying OS/Filesystem does not support it wont work

Thanks

--
LSC

On 8/2/07, edwin devadanam <edwin_kodamala_at_yahoo.com> 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_at_gmail.com>* 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_at_yahoo.com> 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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