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Date: Fri, 25 Aug 2017 18:55:00 +0000 (UTC)
From: "Biju Nair (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12785138.1427195903000.122982.1503687300857@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-13320) 'hbase.bucketcache.size'
 configuration value is not correct in hbase-default.xml
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archived-at: Fri, 25 Aug 2017 18:55:12 -0000


    [ https://issues.apache.org/jira/browse/HBASE-13320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16142030#comment-16142030 ] 

Biju Nair commented on HBASE-13320:
-----------------------------------

{{hbase.bucketcache.size}} is the total size of the off heap cache. no?

Also a value of "percentage to total heap size" to this property should be applicable if the buckeCache io engine is set to  "heap". For ease of use, it would be good to accept only a percentage value (float value of > 0 and < 1) if the io engine is heap. Currently users can set a percentage or an actual size. By forcing to a percentage, it will be in sync with the other heap allocations like memstore and lruBlockCache configuration value and also will help avoid users exceeding the 80% heap size limit.

> 'hbase.bucketcache.size' configuration value is not correct in hbase-default.xml 
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-13320
>                 URL: https://issues.apache.org/jira/browse/HBASE-13320
>             Project: HBase
>          Issue Type: Bug
>          Components: BucketCache, hbase
>    Affects Versions: 2.0.0
>            Reporter: Y. SREENIVASULU REDDY
>            Assignee: Y. SREENIVASULU REDDY
>             Fix For: 2.0.0
>
>         Attachments: HBASE-13320.patch, HBASE-v2-13320.patch
>
>
> In  hbase-default.xml  file 
> * 'hbase.bucketcache.size' is not correct
> We either specify it as a float or in MB's and the default value that is mentioned is never used
> {code}
> <property>
> <name>hbase.bucketcache.size</name>
> <value>65536</value>
> <source>hbase-default.xml</source>
> </property>
> {code}


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