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From "Denis Chudov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-10913) Reduce heap occupation by o.a.i.i.processors.cache.persistence.file.FilePageStore instances.
Date Mon, 20 May 2019 16:10:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-10913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16844078#comment-16844078
] 

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

This PR should not be merged to master before passing performance tests.

> 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: 0.5h
>  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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