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From "Vijay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5521) move IndexSummary off heap
Date Mon, 29 Apr 2013 03:38:16 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13644237#comment-13644237
] 

Vijay commented on CASSANDRA-5521:
----------------------------------

{quote}
Seems inefficient to make the "get pair" the unit of fetching memory,
{quote}
Ahaa good point will fix it.

{quote}
What's the upgrade path? Would prefer "automatically rebuilds old summaries" to "user has
to manually blow away summaries or it dies trying to start."
{quote}
It is automatic, but until the user runs scrub or until the new SST's are created the startup
will be slow.
                
> move IndexSummary off heap
> --------------------------
>
>                 Key: CASSANDRA-5521
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5521
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Vijay
>             Fix For: 2.0
>
>
> IndexSummary can still use a lot of heap for narrow-row sstables.  (It can also contribute
to memory fragmentation because of the large arrays it creates.)

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