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Posted to issues@hbase.apache.org by "Vladimir Rodionov (JIRA)" <ji...@apache.org> on 2016/03/26 23:00:26 UTC

[jira] [Updated] (HBASE-15542) Minimize garbage memory allocations during compaction

     [ https://issues.apache.org/jira/browse/HBASE-15542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Rodionov updated HBASE-15542:
--------------------------------------
    Summary: Minimize garbage memory allocations during compaction  (was: Minimize garbage allocation during compaction)

> Minimize garbage memory allocations during compaction
> -----------------------------------------------------
>
>                 Key: HBASE-15542
>                 URL: https://issues.apache.org/jira/browse/HBASE-15542
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>    Affects Versions: 2.0.0
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>             Fix For: 2.0.0
>
>
> Compactions are CPU-bound, not I/O bound. We can mitigate this by increasing number of compaction threads for small and large compactions, but  excessive object allocation limits maximum number of compaction threads we can use w/o bringing down RS due to very frequent GC cycles.   
>  



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