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https://issues.apache.org/jira/browse/UIMA-5306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15892187#comment-15892187
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Dennis Bauer commented on UIMA-5306:
------------------------------------
But now you have the problems, that this expressiveness gives you the
possibility to break your memory, because one brace could cause many
rulematches.
Yeah, maybe we can evaluate this version for our software :)
> Memory Improvement - Unnecessary leaks
> --------------------------------------
>
> Key: UIMA-5306
> URL: https://issues.apache.org/jira/browse/UIMA-5306
> Project: UIMA
> Issue Type: Improvement
> Components: Ruta
> Affects Versions: 2.3.0ruta
> Environment: Windows 10, JVM with -Xmx 1024, Java JDK 1.8., 16gb
> memory
> Reporter: Dennis Bauer
> Assignee: Peter Klügl
>
> In a productive setup we figured out, that there is a huge memory usage of
> Ruta itself. With JVisualVM it's easy to see, that there is a relative small
> amount of arrays of Arraylists but with a high memory consumption (250k
> instances result in 243 000 000 byte memory that are reserved)
> The problem is, that in a clustered SaaS environment with less memory, these
> arrays block relevant space in memory. A deeper look into these Arrays of
> Arraylist let suggest the class org.apache.uima.ruta.type.RutaBasic
> A look at this class show three arrays that are instanced with the max.
> possible value, that can be returned by the typesystem of CAS.
> {code:Java}
> private int[] partOf = new int[((TypeSystemImpl)
> getCAS().getTypeSystem()).getLargestTypeCode()];
> private Collection<?>[] beginMap = new ArrayList<?>[((TypeSystemImpl)
> getCAS().getTypeSystem())
> .getLargestTypeCode()];
> private Collection<?>[] endMap = new ArrayList<?>[((TypeSystemImpl)
> getCAS().getTypeSystem())
> .getLargestTypeCode()];
>
> {code}
> In this improvement should be done an dynamic allocation of memory usage for
> these arrays, so the total memory consumption would be reduced.
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