within the interval, latency_sum is a sum of latencies
(so you can compute average latency easily). The following two fields are useful
for variance estimation - latency_sum> is a sum of latencies and
- latency_2_sum> is a sum of 2nd powers of latencies. The last two
+ latency_2_sum> is a sum of 2nd powers of latencies. The next two
fields are min_latency> - a minimum latency within the interval, and
max_latency> - maximum latency within the interval. A transaction is
counted into the interval when it was committed. The fields in the end,