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Process(s) ID waiting on IO?

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# 8  
Old 03-14-2007
Quote:
Originally Posted by Citrus143
Thanks a lot for your inputs.

Yes, I agree with Jim that "Oracle systems root causes are often bad queries and/or lack of tuning".

But, here in my case, my database is perfectly good and well tuned. We did not had any Performance Issues on this database for at least 3 months now. Normally, the Idle CPU ranges between 80+ to 98 in our case.

From yesterday at around 5:30PM, the CPU is consistently waiting on I/O (33% wait). From the database, there are no long running queries and only few session are connected to the database and they were mostly idle. It is some OS process which is waiting on I/O and we would like to know which process is it waiting?

Now, for time being lets forget about Oracle, I would like to see which processes are waiting on i/o?

Thanks again for trying to solve the issue!!!
I dunno if this is going to be of any help but I thought of something which maybe of some help.

Try "iostat -xn" and check for the "%b" and svt_t (or any related column - dunno what is on your system) for higher values. You will get the device and the full path of file system which is having blocked I/O. Depending on how your login and file systems are organized, you maybe able to find the "login name" with more blocked I/O. Then check the processes related to that login name.

Let me know if this is of any help Smilie
# 9  
Old 03-15-2007
Will try and update you. Thanks buddy for the help!!
# 10  
Old 03-29-2007
Quote:
Originally Posted by Citrus143
Will try and update you. Thanks buddy for the help!!
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