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Posted to issues@hive.apache.org by "Prasanth Jayachandran (Jira)" <ji...@apache.org> on 2020/05/15 23:15:00 UTC

[jira] [Commented] (HIVE-23476) [LLAP] Preallocate arenas for mmap case as well

    [ https://issues.apache.org/jira/browse/HIVE-23476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108739#comment-17108739 ] 

Prasanth Jayachandran commented on HIVE-23476:
----------------------------------------------

[~hashutosh]/[~gopalv] can you please review the change?

> [LLAP] Preallocate arenas for mmap case as well
> -----------------------------------------------
>
>                 Key: HIVE-23476
>                 URL: https://issues.apache.org/jira/browse/HIVE-23476
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>         Attachments: HIVE-23476.1.patch
>
>
> BuddyAllocator pre-allocation of arenas does not happen for mmap cache case. Since we are not filling up the mmap'ed buffers the upfront allocations in constructor is cheap. This can avoid lock free allocation of arenas later in the code. 



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