[jira] [Commented] (ARROW-1795) [Plasma C++] change evict policy

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-1795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16247731#comment-16247731 ] 

ASF GitHub Bot commented on ARROW-1795:
---------------------------------------

luchy0120 opened a new pull request #1303: ARROW-1795:change evict policy
URL: https://github.com/apache/arrow/pull/1303
 
 
   change size to required_space

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> [Plasma C++] change evict policy
> --------------------------------
>
>                 Key: ARROW-1795
>                 URL: https://issues.apache.org/jira/browse/ARROW-1795
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Plasma (C++)
>            Reporter: Lu Qi 
>            Assignee: Lu Qi 
>            Priority: Minor
>              Labels: pull-request-available
>
> say, we have total memory 8 G , we have input 5G data, then comes another 6G data, 
> if we choose to evict space 6G , it will throw exception saying that
> no object can be free. This is because we didn't count the 3G remaining
> space .If we count this remaining 3G , we need to ask only 3G,thus
> we can evict the 5G and we are still alive .



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