It seems the problem is with oracle. Now when I shutdown the WIO is 0% AND when i start oracle, it is showing WIO as 80-90% $ sar -u 2 4 SunOS oracle 5.9 Generic_117171-02 sun4u 10/24/2005 11:54:39 %usr %sys %wio %idle 11:54:41 4 4 85 6 11:54:43 1 2 83 14 11:54:45 1 2 81 16 11:54:47 2 2 82 13 $ how to find out why oracle is causing this high WIO ? can someone help me raja rao <raja4list@xxxxxxxxx> wrote: Yes, When the db was down, there was no change in WIO. Means, the databse connections are not casing this high WIO. Michael McMullen <ganstadba@xxxxxxxxxxx> wrote: OK, but when you had the outage and the database was down did you verify that wio went down, therefore ruling out the o/s? I had a similar problem once, huge i/o, I shutdown the database no i/o problem. On succesful startup and open, huge i/o. I was using startup restrict. The i/o was oracle doing a parallel transaction recovery even after the database was open. Lucky it was a box where I could rebuild users becuase my solution was to drop the user. ----- Original Message ----- From: raja rao To: Michael McMullen ; oracle list Sent: Monday, October 24, 2005 10:41 AM Subject: Re: high io on solaris box Its a production database. The outage window completed. I can no longer take it down. any other way to find the high WIO processes ? Michael McMullen wrote: When you had the database shut down did you still the the high i/o? What did ps -ef show you? Mike --------------------------------- Yahoo! FareChase - Search multiple travel sites in one click. --------------------------------- Yahoo! FareChase - Search multiple travel sites in one click.