Wait EventR/WSynchronous
/AsynchronousSingleblock/
MultiblockElapsed Time
(with 1000+ waits per hour)control file parallel write

Write

AsynchronousMulti< 15mscontrol file sequential read

Read

SynchronousSingle< 20 msdb file parallel readReadAsynchronousMulti< 20 msdb file scattered readReadSynchronousMulti< 20 msdb file sequential readReadSynchronousSingle< 20 msdirect path readReadAsynchronousMulti< 20 msdirect path read tempReadAsynchronousMulti< 20 msdirect path writeWriteAsynchronousMulti<15 msdirect path write tempWriteAsynchronousMulti< 15 mslog file parallel writeWriteAsynchronousMulti< 15 ms

Exadata Related

cell smart table scanReadAsynchronousMulti< 1 mscell single block physical readReadSynchronousSingle< 1 mscell multiblock physical readReadSynchronousMulti< 6 ms