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https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15398092#comment-15398092
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James Taylor commented on HBASE-16296:
--------------------------------------

Yes, that sounds like you're able to repro now. That 140ms pause is the weird 
thing. And it seems related to how much data is there (as we can't detect it 
without a fair amount of data).

> Reverse scan performance degrades when scanner cache size matches page filter 
> size
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-16296
>                 URL: https://issues.apache.org/jira/browse/HBASE-16296
>             Project: HBase
>          Issue Type: Bug
>            Reporter: James Taylor
>         Attachments: generatedata-snippet.java, repro-snippet.java
>
>
> When a reverse scan is done, the server seems to not know it's done when the 
> scanner cache size matches the number of rows in a PageFilter. See 
> PHOENIX-3121 for how this manifests itself. We have a standalone, pure HBase 
> API reproducer too that I'll attach (courtesy of [~churromorales] and 
> [~mujtabachohan]).



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