The value of tmnxEventThrottleLimit specifies the number of
log events that can be logged within the tmnxEventThrottleInterval
for a specific entry in the tmnxEventTable. Once the limit has
been reached, any additional events of that type will be dropped,
i.e. tmnxEventDropCount will be incremented. At the end of the
throttle interval if any events have been dropped a
tmnxLogEventThrottled notification will be sent.