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Posted to issues@ignite.apache.org by "Vladimir Ozerov (JIRA)" <ji...@apache.org> on 2017/04/06 10:56:41 UTC

[jira] [Updated] (IGNITE-2580) Investigate HashMap.Node[] allocations from GridDhtTxPrepareFuture.readyLocks(Iterable)

     [ https://issues.apache.org/jira/browse/IGNITE-2580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Ozerov updated IGNITE-2580:
------------------------------------
    Fix Version/s:     (was: 2.0)
                   2.1

> Investigate HashMap.Node[] allocations from GridDhtTxPrepareFuture.readyLocks(Iterable)
> ---------------------------------------------------------------------------------------
>
>                 Key: IGNITE-2580
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2580
>             Project: Ignite
>          Issue Type: Task
>          Components: cache
>    Affects Versions: 1.5.0.final
>            Reporter: Vladimir Ozerov
>            Priority: Minor
>              Labels: performance
>             Fix For: 2.1
>
>
> *Problem*
> GridDhtTxPrepareFuture is initialized with empty HashSet by default. When single lock is ready HashSet.add() is called causing immediate expansion of underlying HashMap table.
> *Solution*
> Do we really need fully-fledged hash set immediately? Probably we can optimize for single-lock case so that HashSet is not needed at all.



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