Why do you create a new GraphDatabaseService for each of your 1.000 queries? Can’t you create one and reuse it?
The “knowledgeGraph” is only created once, as far as I can see, so even though pagecache_memory is the right setting, you are only applying it to ~0.1% of the databases you start. -- Chris Vest System Engineer, Neo Technology [ skype: mr.chrisvest, twitter: chvest ] > On 25 Mar 2016, at 07:25, Mohammad Hossain Namaki <[email protected]> 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 > > > > > > > > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
