This is a read-write Integer32 that sets the lower boundary value for bin 9, typically the last configurable bin before esaProbeDistStatsGTMax catches everything above the histogram's range. An administrator uses it to define the threshold above which samples are considered worst-case for that probe, directly shaping how the distribution report highlights the tail of poor performance. For example, an operator might set esaProbeDistStatsConfigLowBoundOfBin9 to 640ms so only the most severely delayed packets land in this top bin, with anything even higher counted by esaProbeDistStatsGTMax instead.