This section describes how to adjust the tunable parameters that control the system resources used by VVR. Depending on the system resources that are available, adjustments may be required to the values of some tunable parameters to optimize performance.

Note that in a shared disk group environment, each of the VVR buffer spaces must be set to the same value on each node.

You can modify these tunables by setting their values using the vxtune utility or the system-specific interface. To modify these tunables using the system-specific interface, set their value in the /kernel/drv/vxio.conf file.

For instructions on changing the value of tunables, refer to the Symantec Storage Foundation and High Availability Solutions Replication Administrator's Guide.