Hi Massimo, I'm terribly sorry, I've had a lot of things on my plate, and this sadly fell off. Thanks for the reminder!
Could you please try lowering the heap size (to somewhere between 512M-1G with your available RAM). The Neo4j memory mapping is managed outside of the Java heap. What you want to achieve for ideal performance is to get the entire nodestore and relationshipstore to fit in the memory mapped file cache. You might have to tweak the memory mapping settings to make sure that they are configured to prefer the nodestore and relationship, and have them fully memory mapped. See documentation here: http://docs.neo4j.org/chunked/snapshot/configuration-caches.html#_configuration I didn't see any information on which operating system you are using, so I assumed linux or some other unix. If you are running on Windows the memory mapping IS managed in the Java heap, then you should keep your heap settings at the same size (1.5G) and instead just focus on configuring the memory mapping so that the nodestore and relationship store are fully memory mapped. Cheers, Tobias On Thu, Mar 3, 2011 at 11:18 AM, Massimo Lusetti <mluse...@gmail.com> wrote: > On Fri, Feb 18, 2011 at 2:31 PM, Tobias Ivarsson > <tobias.ivars...@neotechnology.com> wrote: > > > WRT the slowdown you've seen, I'll have to investigate that further. > > Didn't mean to bother anyone but do you have any news regarding the > slowdown I'm still experiencing... !? > > Cheers > -- > Massimo > http://meridio.blogspot.com > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Tobias Ivarsson <tobias.ivars...@neotechnology.com> Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
