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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (IGNITE-3869) Reduce number of temporary objects produced by H2
Date Fri, 10 Nov 2017 08:55:00 GMT

     [ 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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