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https://issues.apache.org/jira/browse/HBASE-12976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14308474#comment-14308474
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Shuaifeng Zhou commented on HBASE-12976:
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Lars, sorry for confussing.
I mean the kvs returned to client by one rpc is defined by catching and 
batching, but the byte size is not controled, may be this parameter can help?
Just an idea.

> Set default value for hbase.client.scanner.max.result.size
> ----------------------------------------------------------
>
>                 Key: HBASE-12976
>                 URL: https://issues.apache.org/jira/browse/HBASE-12976
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 2.0.0, 1.0.1, 1.1.0, 0.98.11
>
>         Attachments: 12976-v2.txt, 12976.txt
>
>
> Setting scanner caching is somewhat of a black art. It's hard to estimate 
> ahead of time how large the result set will be.
> I propose we hbase.client.scanner.max.result.size to 2mb. That is good 
> compromise between performance and buffer usage on typical networks (avoiding 
> OOMs when the caching was chosen too high).
> To an HTable client this is completely transparent.



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