esaProbeDistStatsConfigLowBoundOfBin4 is a read-write Integer32 setting the lower boundary of the fourth histogram bin for this metric's distribution, effectively marking where the most severe category of samples begins. An administrator sets this at the value beyond which a sample should be considered a serious problem worth immediate attention, distinct from the merely marginal samples in bin 3. For example, setting this boundary at twice the customer's contracted delay threshold means any sample landing in bin 4 represents a severe, unmistakable SLA breach rather than a borderline reading.