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Posted to issues@ignite.apache.org by "Denis Chudov (JIRA)" <ji...@apache.org> on 2019/06/05 13:40:00 UTC

[jira] [Commented] (IGNITE-10913) Reduce heap occupation by o.a.i.i.processors.cache.persistence.file.FilePageStore instances.

    [ https://issues.apache.org/jira/browse/IGNITE-10913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856725#comment-16856725 ] 

Denis Chudov commented on IGNITE-10913:
---------------------------------------

Performance check detected no significant difference with master.

> Reduce heap occupation by o.a.i.i.processors.cache.persistence.file.FilePageStore instances.
> --------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-10913
>                 URL: https://issues.apache.org/jira/browse/IGNITE-10913
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Alexei Scherbakov
>            Assignee: Denis Chudov
>            Priority: Major
>             Fix For: 2.8
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> With large topology and large amount of caches/partitions and enabled persistence could be millions of FilePageStore objects in heap (for each partition).
> Each instance has a reference to a File (field cfgFile) storing as String absolute path to a partition.
> Also internal File inplementation (on example UnixFile) also allocates space for file path.
> I observed about 2Gb of heap space occupied by these objects in one of environments.
> Solution: dereference (set to null) cfgFile after object creation, create File object lazily on demand when needed.



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