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https://issues.apache.org/jira/browse/ACCUMULO-2008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17057440#comment-17057440
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Billie Rinaldi commented on ACCUMULO-2008:
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Looks like it still defaults to leaving 25% of the cache unused (for anyone
interested in fixing this in their cluster's configuration). It's okay with me
to close this since it is configurable now. Thanks [~ctubbsii]!
> Block cache reserves section for in-memory blocks
> -------------------------------------------------
>
> Key: ACCUMULO-2008
> URL: https://issues.apache.org/jira/browse/ACCUMULO-2008
> Project: Accumulo
> Issue Type: Bug
> Components: tserver
> Affects Versions: 1.4.4, 1.5.0, 1.6.0
> Reporter: Billie Rinaldi
> Priority: Major
>
> The block cache reserves a quarter of its size for in-memory blocks, but
> Accumulo doesn't have any in-memory blocks. This makes the cache size
> parameters misleading, because the cache will effectively end up using 75% of
> its specified size. This could be fixed by changing the default percentages
> in LruBlockCache, or by using the constructor takes the percentages as
> parameters.
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