The maxmbuf tunable

The value of the maxmbuf tunable limits how much real memory is used by the communications subsystem.

You can also use the maxmbuf tunable to lower the thewall limit. You can view the maxmbuf tunable value by running the lsattr -E -l sys0 command . If themaxmbuf value is greater than 0 , the maxmbuf value is used regardless of the value of thewall tunable.

The default value for the maxmbuf tunable is 0. A value of 0 for the maxmbuf tunable indicates that the thewall tunable is used. You can change the maxmbuf tunable value by using the chdev or smitty commands.