Sergey Kuksenko created CASSANDRA-15037: -------------------------------------------
Summary: cassandra-stress doesn't provide warmup for duration based executions Key: CASSANDRA-15037 URL: https://issues.apache.org/jira/browse/CASSANDRA-15037 Project: Cassandra Issue Type: Bug Components: Legacy/Tools Reporter: Sergey Kuksenko Fix For: 4.0.x Attachments: stress_warmup.patch cassandra-stress utility performs warmup only when number of operations is specified. In case of duration based execution it doesn't provide warmup. That leads to count startup/warmup induced latency that maybe considered as undesired statistics. For example latencies difference between warmed and cold execution even for 15 minutes may reach to: 17% for 99th percentile, 35% for 99.9th and 55% for max latency. Attached patch contains example how it may be fixed. It was chosen to use 1/5 of duration time as warmup time, but probably the proper way to do it is to add a new option. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org