[jboss-jira] [JBoss JIRA] (JBRULES-3250) query construct: Unexpected high memory usage and implicit performance degradation whereas query is NOT called

[Roman Novak (Updated) (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roman Novak updated JBRULES-3250:
---------------------------------

    Attachment: MediumSubPlanningOpt.zip


the file can be used to create the 850,000 fact instances
                
> query construct: Unexpected high memory usage and implicit performance degradation whereas query is NOT called
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: JBRULES-3250
>                 URL: https://issues.jboss.org/browse/JBRULES-3250
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core
>    Affects Versions: 5.3.0.CR1
>         Environment: Windows 7
> java version "1.6.0_25"
> Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
> Java HotSpot(TM) 64-Bit Server VM (build 20.0-b11, mixed mode)
>            Reporter: Roman Novak
>            Assignee: Mark Proctor
>         Attachments: MediumSubPlanningOpt.zip
>
>
> Inserting 850,000 facts of one fact type into working memory results in memory usage (and implicitly in performance degradation) related to the count of occurences of the fact in queries.
> Note: The queries are NOT called. No Rules are fired.
> Memory impact is about 500 MB on heap qith the shown query.
> Performance impact was factor 5 (which maybe cannot be observed with this example).

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