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Checking the NFS TCP maximum transfer size

For NFS, you can check whether the TCP maximum transfer size for reads and writes might be causing a performance issue. If you think the size is slowing performance, you can increase it.

Before you begin

  • You must have cluster administrator privileges to perform this task.

  • You must use advanced privilege level commands for this task.

  1. Change to the advanced privilege level: set -privilege advanced
  2. Check the TCP maximum transfer size: vserver nfs show -vserver vserver_name -instance
  3. If the TCP maximum transfer size is too small, increase the size: vserver nfs modify -vserver vserver_name -tcp-max-xfer-size integer
  4. Return to the administrative privilege level: set -privilege admin

Example​

The following example changes the TCP maximum transfer size of SVM1 to 1048576:

cluster1::*> vserver nfs modify -vserver SVM1 -tcp-max-xfer-size 1048576