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Posted to dev@hbase.apache.org by "Anastasia Braginsky (JIRA)" <ji...@apache.org> on 2017/12/13 10:46:00 UTC

[jira] [Created] (HBASE-19506) Support variable sized chunks from ChunkCreator

Anastasia Braginsky created HBASE-19506:
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             Summary: Support variable sized chunks from ChunkCreator
                 Key: HBASE-19506
                 URL: https://issues.apache.org/jira/browse/HBASE-19506
             Project: HBase
          Issue Type: Sub-task
            Reporter: Anastasia Braginsky


When CellChunkMap is created it allocates a special index chunk (or chunks) where array of cell-representations is stored. When the number of cell-representations is small, it is preferable to allocate a chunk smaller than a default value which is 2MB.

On the other hand, those "non-standard size" chunks can not be used in pool. On-demand allocations in off-heap are costly. So this JIRA is about to investigate the trade of between memory usage and the final performance. 



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