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Posted to issues@ignite.apache.org by "Vladimir Ozerov (JIRA)" <ji...@apache.org> on 2017/11/10 08:55:00 UTC
[jira] [Resolved] (IGNITE-3869) Reduce number of temporary objects
produced by H2
[ https://issues.apache.org/jira/browse/IGNITE-3869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vladimir Ozerov resolved IGNITE-3869.
-------------------------------------
Resolution: Won't Fix
Not an issue at the moment. Most objects are short-lived, except of ones passed to IO messages. I tried to remove them from messages, but no performance changes were observed. Also we do not observe user complaints about GC due to H2.
> Reduce number of temporary objects produced by H2
> -------------------------------------------------
>
> Key: IGNITE-3869
> URL: https://issues.apache.org/jira/browse/IGNITE-3869
> Project: Ignite
> Issue Type: Task
> Components: sql
> Affects Versions: 1.4
> Reporter: Denis Magda
>
> Presently during the execution of a query H2 generates significant number of temporal objects (kind of wrappers) that eventually exhaust the heap and trigger long GC pauses.
> Need to revisit present implementation improving Ignite SQL engine and/or H2.
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