db file sequential read
The db file sequential read wait event has three parameters: file#, first block#, and block count. In Oracle Database 10g, this wait event falls under the User I/O wait class. Keep the following key thoughts in mind when dealing with the db file sequential read wait event.
The Oracle process wants a block that is currently not in the SGA, and it is waiting for the database block to be read into the SGA from disk.
The two important numbers to look for are the TIME_WAITED and AVERAGE_WAIT by individual sessions.
Significant ...
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