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Benedict updated CASSANDRA-6943: -------------------------------- Attachment: 6943.2.txt Attaching patch with fix and improved tests (both long test now triggers this, and a specific unit test) > very contentious writes result in performance degradation > --------------------------------------------------------- > > Key: CASSANDRA-6943 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6943 > Project: Cassandra > Issue Type: Bug > Reporter: Russ Hatch > Attachments: 6943.2.txt, 6943.txt, node4.log, node4_jstack.log, > node5.log, node5_jstack.log, node6.log, node6_jstack.log, node7.log, > node7_jstack.log, screenshot.png, screenshot2.png, stress_jstack.log > > > Running performance scenarios I have seen this characteristic drop in > performance happen several times. A similar effect was reproduced in another > test cluster. Operations eventually come to a standstill. > !screenshot.png! > !screenshot2.png! -- This message was sent by Atlassian JIRA (v6.2#6252)