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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HIVE-16237) BuddyAllocator fragmentation - long-term fix
Date Thu, 16 Mar 2017 23:15:41 GMT

     [ https://issues.apache.org/jira/browse/HIVE-16237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin resolved HIVE-16237.
-------------------------------------
    Resolution: Duplicate

dup of HIVE-16233

> BuddyAllocator fragmentation - long-term fix
> --------------------------------------------
>
>                 Key: HIVE-16237
>                 URL: https://issues.apache.org/jira/browse/HIVE-16237
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>
> We were initially planning to write a different allocator with compaction, but now we
are stuck with buddyallocator.
> There are two approaches - compaction on top of buddy allocator (should be fairly simple
actually, aside from indirection... luckily for the latter, we can take the buffer out in
most places and we can reuse the existing locking-to-prevent-eviction mechanism to also prevent
reallocation); or writing a better allocator. Probably the former is preferred, need to think
about the latter.



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