Default: 8             Value: binary relative time

    The amount of time, in hours, between times when the address and
    node name information is checkpointed (flushed) to disk from the
    in-memory, local naming cache.  The minimum is 15 minutes.

    Examples:

    set session control -
            naming cache checkpoint interval 08:00:00

    set session control -
            naming cache checkpoint interval 00:15:00