David, could you post your neo4j.properties configuration, so we can see how that is configured? Also, what is the size of your store files?
I guess you are right, there is a lot of reading/writing going on. Do you see any differences in Windows vs. Linux? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Thu, Oct 28, 2010 at 7:38 PM, david lightstone <[email protected]> wrote: > Hi everyone, > > I'm running Neo4j on both Ubuntu and Windows 7 boxes. I have a dataset with > 200 million edges and 10 million nodes with a median branching factor of > about 50 outgoing, directed edges/node. I'm trying to run the BFS search on > the data but am fairing unsuccessful in being able to do so in a timely > fashion. I have tried to follow the advice on > http://wiki.neo4j.org/content/Neo4j_Performance_Guide but I still have > queries that can take up to 300 seconds or so to run. My Ubuntu box has 6GB > of RAM, and is running on a 7200RPM hard drive, while my windows box has 8GB > RAM and is running off of SSDs (HDtune reports ~300 MB/s reads). > > I had also added an index for the nodes. > > Can anyone offer advice on why this process may be taking so long? The CPU > usage on both is very low (2-5%) and I'm pretty sure the whole thing is HDD > i/o limited, but I was wondering if there were any techniques or anything to > actually get the query to go any faster? > > Judging by what I had read about Neo4j in descriptions I assumed that my > data size was not too large to justify a long BFS (the paths can take up to > 300 seconds just 4 nodes away.) > > Thank you in advance. > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
