Re: Database Performance Problem between 3:00PM and 4:00PM

On Oct 22, 9:56 am, zigzag..._at_yahoo.com wrote:
> I am Windows 2000 server using Oracle 9.2.0.6. We have strange problem
> where by database becomes extremely slow between 3:00PM and 4:00PM.
> Same queries which take 15 seconds before 3:00PM (e.g., 2:55PM) take
> 3-4 minutes at 3:00PM and after that. Poblem starts right at 3:00PM
> every day. No of users etc are same. We have asked users not to use
> the system during that period for isolating performance problem,
> without any success.
>
> When one looks at CPU Usage, Memory Usage and Disk Usage nothing
> changes between 2:55PM and (3:00PM-4:00PM). I kooked at task mgr, no
> new processes. I have looked at Windows scheduler, Oracle dbms_job.
> Nothing is running between 3:00PM-4:00PM. I have no clue why system
> becomes so slow in that period. I was hoping that some job starts at
> that time, but cannot find any. Any ideas for troubleshooting will be
> appreciated.

I'd be running Statspack reports starting at 1 PM and extending, every 30 minutes, to the end of the business day (5 PM) then start looking at those. You may find something unusual.

David Fitzjarrell Received on Mon Oct 22 2007 - 10:22:22 CDT