free buffer waits
The free buffer waits event has three parameters: file#, block#, and set ID. In Oracle Database 10g, this wait event falls under the Configuration wait class. Keep the following key thoughts in mind when dealing with the free buffer waits event.
Before a block is read into the buffer cache, an Oracle process must find and get a free buffer for the block. Sessions wait on the free buffer waits event when they are unable to find a free buffer on the LRU list or when all buffer gets are suspended.
The DBWR process is responsible ...
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