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Disk file operations I/O waits

User_R812BFeb 18 2013 — edited Feb 19 2013

Hi,
I have a production database running 11.2.0.3 on a Windows server.
It has been running for about a year without problems, but today we experiences big performance problems.

When I take a look at the AWR report we have "DIsk file operations I/O" waits for 30% of the DBTime.
Checking the AWR for last week we had no such waits.

The disks are on SAN. and the SAN guys can not see any problems so far.

Any suggestions? Why do we suddenly have these kind of waits??

Thanks!

Brg
jio

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Locked on Mar 19 2013

Added on Feb 18 2013

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