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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19452) Turn ON off heap Bucket Cache by default
Date Tue, 12 Dec 2017 05:07:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16287114#comment-16287114
] 

Anoop Sam John commented on HBASE-19452:
----------------------------------------

No problem really.. Even the xmx part also under comments..  And pls note that by def there
is no upper bound for the off heap allocation for a java process.  We make a cap so as not
to eat up too much off heap memory.  So default it is unlimited.

> Turn ON off heap Bucket Cache by default
> ----------------------------------------
>
>                 Key: HBASE-19452
>                 URL: https://issues.apache.org/jira/browse/HBASE-19452
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19452.patch, HBASE-19452_V2.patch
>
>
> BC's hbase.bucketcache.ioengine by default is empty now. Means now BC.
> Make this default to be 'offheap'.  And the default off heap size for the BC also to
be provided. This can be 8 GB?
> Also we should provide a new option 'none' for this hbase.bucketcache.ioengine  now for
users who dont need BC at all.



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