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https://issues.apache.org/jira/browse/HBASE-19506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16309706#comment-16309706
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Ted Yu commented on HBASE-19506:
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bq. one index chunk with about 52800 cell-representations is allocated
Where does the number 52800 come from ?
> 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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