[
https://issues.apache.org/jira/browse/UIMA-5306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15888077#comment-15888077
]
Dennis Bauer commented on UIMA-5306:
------------------------------------
Dealing with legacy systems isn't that fun, I know that. In regard with our
optimization plans, we found some code fragments, that could be changed to
gather up some memory space. There are also many, final static fields in nearly
all classes, that could be replaced.
We're need the Ruta-Annotations to process the texts, so we're measuring with
these annotations.
But like you meantioned, there are a lot of pieces that could be refactored and
making trouble, so we have to do our best, to get it performant.
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
