The amount of buffer space allocated for log messages, as determined by the object bnLogMsgBufferMaxSize, is finite and thus only a limited amount of log messages may be saved on the device. This object specifies the action to take when this space is exhausted. Selecting overwrite(1) will cause previous messages to be over- written. Messages are overwritten based on FIFO. Specifying latch(2) causes no more messages to be saved until this object is changed to overwrite(1) or until the buffer space is made available through some other means (e.g., clearing the buffer). Note that this object only pertains to messages that are maintained in volatile storage. Messages that are saved in non-volatile storage are never overwritten. They must be cleared manually using the object bnLogMsgBufferClearTargets.