The HBase doc mentions latency metrics https://hbase.apache.org/book.html#hbase_metrics but without giving any unit ;-(
Operation latencies, where <op> is one of Append, Delete, Mutate, Get, Replay, Increment; and where <measure> is one of min, max, mean, median, 75th_percentile, 95th_percentile, 99th_percentile
QUESTION_1 : is "millis" the unit ? micros or nanos ?
QUESTION_2 : how is measured avg metrics for example ? is it calculated from t0 (startup time), or from a given period of time (and reset at the begining of every period of time) ?
Due to (2), how to measure latency for, let say, the last 5 mn ?
If one has only a metric for measuring median latency from t0 (startup time), it's quite useless, for example, for detecting a surge in latency.
Any hint ?
Actually, it looks like I might have missed something the first time. I think the metrics are rolled every 60 seconds (based off of https://github.com/apache/hbase/blob/branch-1.1/hbase-hadoop2-compat/src/main/java/org/apache/hadoop... and https://github.com/apache/hbase/blob/branch-1.1/hbase-hadoop2-compat/src/main/java/org/apache/hadoop....