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

[C. Scott Andreas (JIRA)]

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

C. Scott Andreas updated CASSANDRA-12668:
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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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[jira] [Updated] (CASSANDRA-12668) Memtable Contention in 2.1

[sankalp kohli (JIRA)]

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

sankalp kohli updated CASSANDRA-12668:
--
Reproduced In: 2.1.15

> Memtable Contention in 2.1
> --
>
> Key: CASSANDRA-12668
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12668
> Project: Cassandra
>  Issue Type: Bug
>Reporter: sankalp kohli
>
> 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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