cassandra-stressの出力の解釈

実行中のテストの出力について。

各行は、前回の経過時刻から現在の経過時刻までの間隔のデータを示します。

Created keyspaces.Sleeping 1s for propagation.Warming up WRITE with 50000 iterations...INFO 23:57:05 Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor) Connected to cluster:Test Cluster Datacenter:datacenter1; Host:localhost/127.0.0.1; Rack:rack1 INFO 23:57:05 New Cassandra host localhost/127.0.0.1:9042 added Sleeping 2s...WARNING:uncertainty mode (err<) results in uneven workload between thread runs, so should be used for high level analysis only Running with 4 threadCount Running WRITE with 4 threads until stderr of mean < 0.02 total ops , adj row/s, op/s, pk/s, row/s, mean, med, .95, .99, .999, max, time, stderr, gc:#, max ms, sum ms, sdv ms, mb 2552 , 2553, 2553, 2553, 2553, 1.5, 1.4, 2.5, 6.0, 12.6, 18.0, 1.0, 0.00000, 0, 0, 0, 0, 0 5173 , 2634, 2613, 2613, 2613, 1.5, 1.5, 1.8, 2.6, 8.6, 9.2, 2.0, 0.00000, 0, 0, 0, 0, 0 ...結果：op rate :3954 partition rate :3954 row rate :3954 latency mean :1.0 latency median :0.8 latency 95th percentile :1.5 latency 99th percentile :1.8 latency 99.9th percentile :2.2 latency max :73.6 total gc count :25 total gc mb :1826 total gc time (s) :1 avg gc time(ms) :37 stdev gc time(ms) :10 Total operation time :00:00:59 Sleeping for 15s Running with 4 threadCount