You can control disk I/O slaves by setting the DBWR_IO_SLAVES initialization parameter, which is not dynamic. The parameter specifies the number of I/O server processes used by the database writer process (DBWR). By default, the value is 0 and I/O server processes are not used. If asynchronous I/O is disabled, then RMAN allocates four backup disk I/O slaves for any nonzero value of DBWR_IO_SLAVES.
the RATE parameter specifies the bytes per second that are read on a channel. You can use this parameter to set an upper limit for bytes read so that RMAN does not consume excessive disk bandwidth and degrade online performance.
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RodrigoEscobedo
2 years agoRodrigoEscobedo
2 years ago