[
https://issues.apache.org/jira/browse/CASSANDRA-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14619286#comment-14619286
]
sankalp kohli commented on CASSANDRA-9754:
------------------------------------------
The strongly referenced IndexInfo objects are mostly from key cache(100MB we
are using). The problem is that due to key cache, all these objects will get
promoted and cause fragmentation when evicted from key cache.
I also looked at a heap dump generated by an OOM. 93% of the retained size was
coming from IndexInfo.
> 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
> 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?
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
