NetBackup for SQL Server supports an alternate buffer method. It optimizes CPU usage by allowing NetBackup and SQL Server to share the same memory buffers without transferring data between them.

The alternate buffer method for backup and restore typically does not improve data transfer rate, only CPU utilization. A situation may occur in which the transfer rate is significantly degraded when alternate buffer method is in use. To improve the transfer rate set the MAXTRANSFERSIZE for the backup to the maximum allowed, which is 4 megabytes. Set this parameter by choosing File > Set NetBackup client properties or add this parameter to a batch file.