This read-only Counter64 holds the actual numeric value of the counter identified by rlPortStatLastEventCounter at the time the last event was recorded. Pairing this value with the counter name and timestamp lets an admin see exactly how high a metric was when it last triggered a notable event, without having to poll the full counter table. For example, if the paired counter name is an error counter and this value jumps to a large number between polls, the admin knows that specific error type spiked around the recorded event time.