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https://issues.apache.org/jira/browse/PHOENIX-3486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15864897#comment-15864897
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Jeongdae Kim commented on PHOENIX-3486:
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failed tests are not related to this patch. could anyone give me reviews for
this patch?
> RoundRobinResultIterator doesn't work correctly because of setting Scan's
> cache size inappropriately in PhoenixInputForamt
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-3486
> URL: https://issues.apache.org/jira/browse/PHOENIX-3486
> Project: Phoenix
> Issue Type: Bug
> Reporter: Jeongdae Kim
> Assignee: Jeongdae Kim
> Labels: HivePhoenix
> Attachments: PHOENIX-3486.patch
>
>
> RoundRobinResultIterator uses "hbase.client.scanner.caching" to fill caches
> in parallel for all scans, but by setting Scan.setCaching() in
> PhoenixInputForrmat(phoenix-hive), RoundRobinResultIterator doesn't work
> correctly, because if Scan have cache size by setCaching(), HBase uses cache
> size from Scan.getCaching() to fill cache, not
> "hbase.client.scanner.caching", and RoundRobinResultIterator scans the table
> in parallel to fill caches every "hbase.client.scanner.caching", resulting in
> unintended parallel scan operation, this causes scan performance degradation.
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