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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7008) Set scanner caching to a better default
Date Tue, 23 Oct 2012 21:50:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13482733#comment-13482733
] 

Lars Hofhansl commented on HBASE-7008:
--------------------------------------

It does look that way. It also seems that disabling Nagle's almost never leads to worse scan
performance.
So we have various options now:
# Disable Nagle's and increase scanner caching to 100 by default
# Only increase the scanner caching default, leave Nagle's on by default
# Leave things as they are and document setting scanner caching in the important settings.

Based on my limited testing I'd vote for #1.
                
> Set scanner caching to a better default
> ---------------------------------------
>
>                 Key: HBASE-7008
>                 URL: https://issues.apache.org/jira/browse/HBASE-7008
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>            Reporter: liang xie
>            Assignee: liang xie
>             Fix For: 0.94.3, 0.96.0
>
>         Attachments: 7008-0.94.txt, 7008-0.94-v2.txt, 7008-v3.txt, 7008-v4.txt, HBASE-7008.patch,
HBASE-7008-v2.patch
>
>
> per http://search-hadoop.com/m/qaRu9iM2f02/Set+scanner+caching+to+a+better+default%253F&subj=Set+scanner+caching+to+a+better+default+
> let's set to 100 by default

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