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

[edwin devadanam <edwin_kodamala@xxxxxxxxx>]

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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