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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/08/29 08:55:00 UTC

[jira] [Assigned] (SPARK-21860) Optimize heap memory allocator

     [ https://issues.apache.org/jira/browse/SPARK-21860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-21860:
------------------------------------

    Assignee:     (was: Apache Spark)

> Optimize heap memory allocator
> ------------------------------
>
>                 Key: SPARK-21860
>                 URL: https://issues.apache.org/jira/browse/SPARK-21860
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 2.3.0
>            Reporter: liuxian
>            Priority: Minor
>
> In `HeapMemoryAllocator`, when allocating memory from pool,  and the key of pool is memory size.
> Actually  some size of memory ,such as 1025bytes,1026bytes,......1032bytes,  we can think they are the same，because we allocate memory in multiples of 8 bytes.
> In this case, we can improve memory reuse.



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