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

["Rok Mihevc (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-1795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rok Mihevc updated ARROW-1795:
------------------------------
    External issue URL: https://github.com/apache/arrow/issues/17792

> [Plasma C++] change evict policy
> --------------------------------
>
>                 Key: ARROW-1795
>                 URL: https://issues.apache.org/jira/browse/ARROW-1795
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++ - Plasma
>            Reporter: Lu Qi 
>            Assignee: Robert Nishihara
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 0.8.0
>
>
> case 1.say, we have total free 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 free
> space .If we count this remaining 3G , we need to ask only 3G,thus
> we can evict the 5G data and we are still alive . 
> case 2. another situation is :  if we have free memory 10G , we input 1.5G data ,then comes another
> 9G data , if we use  10*20% = 2G data to evict ,then we will crash . In this situation we need to 
> use 9+1.5-10 = 0.5G data to evict  



--
This message was sent by Atlassian Jira
(v8.20.10#820010)