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Posted to commits@cassandra.apache.org by "sankalp kohli (JIRA)" <ji...@apache.org> on 2015/07/31 23:31:04 UTC

[jira] [Updated] (CASSANDRA-9754) Make index info heap friendly for large CQL partitions

     [ https://issues.apache.org/jira/browse/CASSANDRA-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

sankalp kohli updated CASSANDRA-9754:
-------------------------------------
    Assignee: Michael Kjellman

> Make index info heap friendly for large CQL partitions
> ------------------------------------------------------
>
>                 Key: CASSANDRA-9754
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9754
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>            Assignee: Michael Kjellman
>            Priority: Minor
>
>  Looking at a heap dump of 2.0 cluster, I found that majority of the objects are IndexInfo and its ByteBuffers. This is specially bad in endpoints with large CQL partitions. If a CQL partition is say 6,4GB, it will have 100K IndexInfo objects and 200K ByteBuffers. This will create a lot of churn for GC. Can this be improved by not creating so many objects?



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