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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-5521) move IndexSummary off heap
Date Mon, 29 Apr 2013 03:24:16 GMT


Jonathan Ellis commented on CASSANDRA-5521:

Seems inefficient to make the "get pair" the unit of fetching memory, since usually you want
the key or the position but not both.  (You wouldn't have to change the signature of getKey
either, if you just fetched the key into a byte[] directly instead of wrapping half of it.)

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."
> move IndexSummary off heap
> --------------------------
>                 Key: CASSANDRA-5521
>                 URL:
>             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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