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what is mean by User I/O Wait time...

451840Nov 18 2008 — edited Nov 19 2008

Hi Guys
what is mean by User I/O Wait time,System I/O Wait Time?
Also will the Application uses an index which is in Invalid state?
What is the use of SQL area Cache in the Library Cache?

Kndly Help me..

Thanks

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Locked on Dec 17 2008

Added on Nov 18 2008

#general-database-discussions

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