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https://issues.apache.org/jira/browse/CASSANDRA-10609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14980557#comment-14980557
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Alan Boudreault commented on CASSANDRA-10609:
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This issue will be fix with CASSANDRA-10614
> MV performance regression
> -------------------------
>
> Key: CASSANDRA-10609
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10609
> Project: Cassandra
> Issue Type: Bug
> Environment: EC2
> Reporter: Alan Boudreault
> Assignee: Tyler Hobbs
> Priority: Critical
> Fix For: 3.0.0
>
>
> I've noticed an important MV performance regression that has been introduced
> in 3.0.0-rc1. The issue has been introduced by CASSANDRA-9664.
> * I'm using mvbench to test with RF=3
> * I confirm it's not a driver issue.
> {code}
> EC2 RF=3 (i2.2xlarge, also tried on i2.4xlarge)
> mvn exec:java -Dexec.args="--num-users 100000 --num-songs 1000000
> --num-artists 10000 -n 500000 --endpoint node1"
> 3.0.0-beta2 (alpha2 java driver)
> -----------
> total
> count = 461601
> mean rate = 1923.21 calls/second
> 1-minute rate = 1937.82 calls/second
> 5-minute rate = 1424.09 calls/second
> 15-minute rate = 1058.28 calls/second
> min = 1.90 milliseconds
> max = 3707.76 milliseconds
> mean = 516.42 milliseconds
> stddev = 457.41 milliseconds
> median = 390.07 milliseconds
> 75% <= 775.95 milliseconds
> 95% <= 1417.67 milliseconds
> 98% <= 1728.05 milliseconds
> 99% <= 1954.55 milliseconds
> 99.9% <= 2566.91 milliseconds
> 3.0.0-rc1 (alpha3 java driver)
> ---------
> total
> count = 310373
> mean rate = 272.25 calls/second
> 1-minute rate = 0.00 calls/second
> 5-minute rate = 45.47 calls/second
> 15-minute rate = 295.94 calls/second
> min = 1.05 milliseconds
> max = 10468.98 milliseconds
> mean = 492.99 milliseconds
> stddev = 510.42 milliseconds
> median = 281.02 milliseconds
> 75% <= 696.25 milliseconds
> 95% <= 1434.45 milliseconds
> 98% <= 1820.33 milliseconds
> 99% <= 2080.37 milliseconds
> 99.9% <= 4362.08 milliseconds
> {code}
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