db file parallel write
In Oracle8i Database, the db file parallel write wait event parameters according to the V$EVENT_NAME view are files, blocks, and requests. Starting in Oracle9i Database, the parameters are requests, interrupt, and timeout. However, according to event 10046 trace, the first parameter has always been the block count or the DBWR write batch size. In Oracle Database 1 0g, this wait event falls under the System I/O wait class. Keep the following key thoughts in mind when dealing with the db file parallel write wait event.
The db file parallel write event belongs only to the DBWR process.
A slow DBWR can impact foreground processes. ...