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https://issues.apache.org/jira/browse/UIMA-5306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15939973#comment-15939973
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Dennis Bauer commented on UIMA-5306:
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Yes, the counter will break the rule execution, if the actual executed rule has
produced too much matches and therefore, we would expect, that this rule is not
efficient. The exception would break the execution, yes, but it's more a hint
for the developer, to say, there is a very bad written rule.
We've had a rule condition with "ANY[0-500]" we checked, that produced nearly
unlimited matches on big texts. A bigger example is not existing yet, nor a
solution we could publish.
The logging was developped as a Visitor and added like that to the DebugVisitor
at RutaEngine. The visitor is only be added, if the property is set. Also,
there is a property to activate this logging to that point, as a give amount of
the counter is exceeded.
There is no better generic solution to add new visitors, the Visitor-Interface
and the used pattern in RutaEngine is good enough I think.
> 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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