Database Tuning (MOSC)

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User I/O wait

edited Dec 11, 2012 7:33PM in Database Tuning (MOSC) 2 commentsAnswered
Hi Gurus,
I have a 11.2.0.3 RAC database on Linux RHEL5. Application team has executed a SQL query and it has taken some more time than what was expected. When I ran the AWR report later, I could see that the User I/O wait for this particular query was very high. How can I investigate more on this to find out what all events have contributed to this high User I/O ? what all reports/queries I can run to find out the details specifically for this SQL query? Please note that  multiple different SQL queries were  running parallel  when the above query

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