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https://issues.apache.org/jira/browse/HBASE-17757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15900975#comment-15900975
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Ted Yu commented on HBASE-17757:
--------------------------------
{code}
+ public static final String UNIFY_ENCODED_BLOCKSIZE_ENABLED =
"hbase.writer.unify.encoded.blocksize.enabled";
{code}
unify -> unified
{code}
+ float encodeBlockSizeRatio = conf.getFloat(UNIFY_ENCODED_BLOCKSIZE_RATIO,
0.5f);
{code}
How is the default value of 0.5 determined ?
> 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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