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Posted to commits@cassandra.apache.org by "C. Scott Andreas (JIRA)" <ji...@apache.org> on 2018/11/19 02:11:00 UTC

[jira] [Updated] (CASSANDRA-12668) Memtable Contention in 2.1

     [ https://issues.apache.org/jira/browse/CASSANDRA-12668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

C. Scott Andreas updated CASSANDRA-12668:
-----------------------------------------
    Component/s: Core

> Memtable Contention in 2.1
> --------------------------
>
>                 Key: CASSANDRA-12668
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12668
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: sankalp kohli
>            Priority: Major
>
> We added a new Btree implementation in 2.1 which causes write performance to go down in Cassandra if there is  lot of contention in the memtable for a CQL partition. Upgrading a cluster from 2.0 to 2.1 with contention causes the cluster to fall apart due to GC. We tried making the defaults added in CASSANDRA-7546 configurable but that did not help. Is there anyway to fix this issue?



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