This is my stacktrace when I get this error:
Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded
at*
org.neo4j.io.pagecache.impl.muninn.MuninnPageCache.<init>(MuninnPageCache.java:246)*
at org.neo4j.kernel.impl.pagecache.ConfiguringPageCacheFactory.
*createPageCache*(ConfiguringPageCacheFactory.java:96)
at org.neo4j.kernel.impl.pagecache.ConfiguringPageCacheFactory.
*getOrCreatePageCache*(ConfiguringPageCacheFactory.java:87)
at
org.neo4j.kernel.impl.factory.PlatformModule.createPageCache(PlatformModule.java:277)
at
org.neo4j.kernel.impl.factory.PlatformModule.<init>(PlatformModule.java:154)
at
org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.createPlatform(GraphDatabaseFacadeFactory.java:181)
at
org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:124)
at
org.neo4j.kernel.impl.factory.CommunityFacadeFactory.newFacade(CommunityFacadeFactory.java:43)
at
org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:108)
at org.neo4j.graphdb.factory.GraphDatabaseFactory.*newDatabase*
(GraphDatabaseFactory.java:129)
at
org.neo4j.graphdb.factory.GraphDatabaseFactory$1.newDatabase(GraphDatabaseFactory.java:117)
at
org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:185)
at
org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:79)
at
org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:74)
at wsu.eecs.mlkd.KGQuery.test.QueryGenerator.*ConstrucQueryGraph*
(QueryGenerator.java:478)
at
wsu.eecs.mlkd.KGQuery.machineLearningQuerying.BeamSearchRunner.initialize(BeamSearchRunner.java:248)
at
wsu.eecs.mlkd.KGQuery.machineLearningQuerying.BeamSearchRunner.main(BeamSearchRunner.java:439)
On Thursday, March 24, 2016 at 11:25:30 PM UTC-7, Mohammad Hossain Namaki
wrote:
>
> Hi all,
> I'm using neo4j.2.3.0.
> I'm running some experiments (over ~1000 graph queries) on the Neo4j Java
> API. I don't use the cypher for that. So, I have my own algorithm. After
> running around 100/200 queries, I'm getting the "GC Overhead Limit
> Exceeded". I think there is something wrong with "
> org.neo4j.io.pagecache.impl.muninn.MuninnPageCache".
>
> *Is there anyway to bound this cache size in Java API? or disable it?*
>
> I've already used this:
>
> knowledgeGraph = new GraphDatabaseFactory().newEmbeddedDatabaseBuilder(
> MODELGRAPH_DB_PATH)
>
> .*setConfig(GraphDatabaseSettings.pagecache_memory, "500M")*
> .newGraphDatabase();
>
> but it didn't work.
>
>
> Every time, I open a nested transaction for both query/data graphs and I
> success/close them after finishing each query.
>
>
> I've used -Xmx12g -Xms12g as VM arguments and my machine has 16GB memory.
> The data graph itself has 4.00 GB volume on the disk.
>
>
> Could you please help me on that?
>
>
> Thanks
>
>
>
>
>
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