Wait Event – db file parallel write

This event occurs in the DBWR. It indicates the time that DBWR spends waiting for I/O completion.

If asynchronous I/O is available, then the db file asynch I/O submit wait event captures any time spent in submitting I/Os to the underlying storage.

When asynchronous I/O is not available, db file parallel write captures the time spent during submit and reap.

Wait Time: While there are outstanding I/Os, DBWR waits for some of the writes to complete. DBWR does not wait for all of the outstanding I/Os to complete.


Parameter Description
requests This indicates the total number of I/O requests, which will be the same as blocks
timeout This indicates the timeout value in hundredths of a second to wait for the I/O completion.

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