Initialization Parameters, 179 of 188

TAPE_ASYNCH_IO

Parameter type:	Boolean
Parameter class:	Static
Default value:	`TRUE`
Range of values:	`TRUE` \| `FALSE`
`TAPE_ASYNCH_IO` controls whether I/O to sequential devices (for example, backup or restore of Oracle data to or from tape) is asynchronous--that is, whether parallel server processes can overlap I/O requests with CPU processing during table scans. If your platform supports asynchronous I/O to sequential devices, Oracle Corporation recommends that you leave this parameter set to its default. However, if the asynchronous I/O implementation is not stable, you can set `TAPE_ASYNCH_IO` to false to disable asynchronous I/O. If your platform does not support asynchronous I/O to sequential devices, this parameter has no effect.
See Also: Oracle8i Designing and Tuning for Performance for more information on asynchronous I/O and on setting this parameter.