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https://issues.apache.org/jira/browse/PHOENIX-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15337055#comment-15337055
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Hudson commented on PHOENIX-3000:
---------------------------------
FAILURE: Integrated in Phoenix-master #1266 (See
[https://builds.apache.org/job/Phoenix-master/1266/])
PHOENIX-3000 Reduce memory consumption during DISTINCT aggregation. (larsh: rev
3581d29071d5023110cc8afc2ec58840e84dc861)
*
phoenix-core/src/main/java/org/apache/phoenix/expression/aggregator/DistinctValueWithCountServerAggregator.java
> Reduce memory consumption during DISTINCT aggregation
> -----------------------------------------------------
>
> Key: PHOENIX-3000
> URL: https://issues.apache.org/jira/browse/PHOENIX-3000
> Project: Phoenix
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 4.8.0
>
> Attachments: 3000-v2.txt, 3000.txt
>
>
> In {{DistinctValueWithCountServerAggregator.aggregate}} we hold on the ptr
> handed to us from HBase.
> Note that this pointer points into an HFile Block, and hence we hold onto the
> entire block for the duration of the aggregation.
> If the column has high cardinality we might attempt holding the entire table
> in memory in the extreme case.
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