|Range of values||0 - 4096|
DNFS_BATCH_SIZE controls the number of asynchronous I/O's that can be queued by an Oracle process when Direct NFS Client is enabled. In environments where the NFS server cannot handle a large number of outstanding asynchronous I/O requests, use this parameter to limit the number of I/O's issued by an Oracle foreground process. The recommended setting for this parameter is to start at 128 and increase or decrease it based on NFS server performance.
DNFS_BATCH_SIZEinitialization parameter is available starting with Oracle Database 11g Release 2 (188.8.131.52).
See Also:Oracle Database Performance Tuning Guide for additional information about the