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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11544) [Ergonomics] hbase.client.scanner.caching is dogged and will try to return batch even if it means OOME
Date Sat, 28 Feb 2015 06:31:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14341378#comment-14341378
] 

stack commented on HBASE-11544:
-------------------------------

Currently run cluster test to ensure no breakage and to look for perf degradation (hopefully
we see opposite).

[~jonathan.lawlor] which of the tests in TestPartialResultsFromClientSide verifies that a
client who is getting partial results has same view as a client who is asking for full rows
at a time; i.e. which tests readpoint is not changed under a scanner that is returning a wide
row in multiple partials? Thanks boss.

> [Ergonomics] hbase.client.scanner.caching is dogged and will try to return batch even
if it means OOME
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-11544
>                 URL: https://issues.apache.org/jira/browse/HBASE-11544
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: Jonathan Lawlor
>            Priority: Critical
>              Labels: beginner
>         Attachments: HBASE-11544-v1.patch, HBASE-11544-v2.patch, HBASE-11544-v3.patch,
HBASE-11544-v4.patch, HBASE-11544-v5.patch, HBASE-11544-v6.patch, HBASE-11544-v6.patch, HBASE-11544-v6.patch
>
>
> Running some tests, I set hbase.client.scanner.caching=1000.  Dataset has large cells.
 I kept OOME'ing.
> Serverside, we should measure how much we've accumulated and return to the client whatever
we've gathered once we pass out a certain size threshold rather than keep accumulating till
we OOME.



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