[jira] Commented: (CASSANDRA-208) jvm crashes intermittently during compaction

["Jun Rao (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714521#action_12714521 ] 

Jun Rao commented on CASSANDRA-208:
-----------------------------------

In your data set, do you have a large row? Today, during compaction, a full row may have to be buffered in memory. See https://issues.apache.org/jira/browse/CASSANDRA-16 for more on this.

> jvm crashes intermittently during compaction
> --------------------------------------------
>
>                 Key: CASSANDRA-208
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-208
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: trunk
>         Environment: arch: x86_64
> os: Linux version 2.6.18-92.1.22.el5 
> java: nio2-ea-bin-b99-linux-x64-05_feb_2009
>            Reporter: Jiansheng Huang
>
> jvm crashes intermittently during compaction. Our test data set is not that big, less than 10 GB.
> When jvm is about to crash, we see that it consumes a lot of memory (exceeding the max heap size).
> The excessive memory usage during compaction is caused by the maintenance of blockIndexes_ in SSTable. this blockIndexes_ was only introduced to the apache version.

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