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https://issues.apache.org/jira/browse/HBASE-17757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15902511#comment-15902511
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Anoop Sam John commented on HBASE-17757:
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Giving 0.5 as the encoded block size ratio by default may not work out then?
Can we just reduce the #configs here? Say by default we want this feature to
be off then give this ratio as 1 only? Just asking. Given the fact that the
ratio very much depend on DBE type and data pattern, making this ON by default
is having a challenge to find a best ratio default value.
> Unify blocksize after encoding to decrease memory fragment
> -----------------------------------------------------------
>
> Key: HBASE-17757
> URL: https://issues.apache.org/jira/browse/HBASE-17757
> Project: HBase
> Issue Type: New Feature
> Reporter: Allan Yang
> Assignee: Allan Yang
> Attachments: HBASE-17757.patch
>
>
> Usually, we store encoded block(uncompressed) in blockcache/bucketCache.
> Though we have set the blocksize, after encoding, blocksize is varied. Varied
> blocksize will cause memory fragment problem, which will result in more FGC
> finally.In order to relief the memory fragment, This issue adjusts the
> encoded block to a unified size.
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