Re: [Neo] Dijkstra search on a big graph
Hello, Cool, let me know if there will be any changes. On 17 February 2010 15:15, Johan Svensson jo...@neotechnology.com wrote: Hi, Just wanted to say that I have successfully reproduced the warning messages and we will have a look at this. -Johan On Tue, Feb 9, 2010 at 11:17 AM, Anton Popov popov.ua.w...@gmail.com wrote: Hello johan, apo...@mars:~$ java -version java version 1.6.0_16 Java(TM) SE Runtime Environment (build 1.6.0_16-b01) Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode) apo...@mars:~$ uname -svr Linux 2.6.28-18-generic #59-Ubuntu SMP Thu Jan 28 01:40:19 UTC 2010 On 8 February 2010 21:38, Johan Svensson jo...@neotechnology.com wrote: Hi Anton, Sounds like you can reproduce this problem? If so I would definitely like to have a look at it. Btw, what JVM and Linux kernel version are you running? -Johan On Mon, Feb 8, 2010 at 3:59 PM, Anton Popov popov.ua.w...@gmail.com wrote: Hello Johan, Thanks for your answer see my answers below: On 8 February 2010 11:15, Johan Svensson jo...@neotechnology.com wrote: Hi, How large heap have you set? I see that you have allocated 3G for memory mapping that leaves about 512M max left for heap size since OS (and other on OS processes) needs some memory. Yes, I've set 3G for memory mapping, but application allocated only 1.8G, that leaves enough memory for OS, imho. Anyway, changing parameters of property file 1G - 500M (so max allocated memory should be 1.5G instead of 3G) changes nothing. I've got the same exceptions. I have not seen this stacktrace on Linux (used to happen a lot on 32-bit windows versions since the 2G continuous map limit really wasn't 2G). I use 64-bit PC if this matters. Try lower nodestore memory mapped settings (check how large file is, should not be 1GByte?) and see if that helps. As described above - using any setting values has no influence on my app. To be sure, I can say that small routes are found pretty fine, without any exceptions. What file you are talking about? ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Best regards, Popov Anton ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Dijkstra search on a big graph
Hello johan, apo...@mars:~$ java -version java version 1.6.0_16 Java(TM) SE Runtime Environment (build 1.6.0_16-b01) Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode) apo...@mars:~$ uname -svr Linux 2.6.28-18-generic #59-Ubuntu SMP Thu Jan 28 01:40:19 UTC 2010 On 8 February 2010 21:38, Johan Svensson jo...@neotechnology.com wrote: Hi Anton, Sounds like you can reproduce this problem? If so I would definitely like to have a look at it. Btw, what JVM and Linux kernel version are you running? -Johan On Mon, Feb 8, 2010 at 3:59 PM, Anton Popov popov.ua.w...@gmail.com wrote: Hello Johan, Thanks for your answer see my answers below: On 8 February 2010 11:15, Johan Svensson jo...@neotechnology.com wrote: Hi, How large heap have you set? I see that you have allocated 3G for memory mapping that leaves about 512M max left for heap size since OS (and other on OS processes) needs some memory. Yes, I've set 3G for memory mapping, but application allocated only 1.8G, that leaves enough memory for OS, imho. Anyway, changing parameters of property file 1G - 500M (so max allocated memory should be 1.5G instead of 3G) changes nothing. I've got the same exceptions. I have not seen this stacktrace on Linux (used to happen a lot on 32-bit windows versions since the 2G continuous map limit really wasn't 2G). I use 64-bit PC if this matters. Try lower nodestore memory mapped settings (check how large file is, should not be 1GByte?) and see if that helps. As described above - using any setting values has no influence on my app. To be sure, I can say that small routes are found pretty fine, without any exceptions. What file you are talking about? Regards, -Johan -- Best regards, Popov Anton ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Best regards, Popov Anton ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Dijkstra search on a big graph
Hi, On Fri, Feb 5, 2010 at 6:36 PM, Anton Popov popov.ua.w...@gmail.com wrote: Hello all, I'm still doing my tests on Neo4J. I've imported some data to Neo4J database trying to search a shortest path search using Dijkstra implementation from neo4j-graph-algo package. As a result - I get exceptions hanged application - can anyone help me to solve the problem? I've packed the bundle, containing Java code, system output (with Exceptions), neo4j.properties and results of top command. It's available here: https://docs.google.com/leaf?id=0Bx7diqqg3SSaYzMzZjU1ZGUtNjhjOS00MDg1LWFhYzItOWY0YjU5MTRlODdmhl=en Please forgive me many System.out prints - that's just an test code to be introduced to the system, it's features performance. After the last Exception, written to the output application seems to hang. Used memory is 1848m during that moment. My environment is: - Ubuntu, 4GB of RAM. - Before test starts, top shows that I have 3.4GB of RAM non-used. So almost no other applications run. - I'm using following Neo4J versions: ... The Exceptions actually are: ... Caused by: java.io.IOException: Invalid argument at sun.nio.ch.FileChannelImpl.truncate0(Native Method) at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:728) at org.neo4j.kernel.impl.nioneo.store.MappedPersistenceWindow.init(MappedPersistenceWindow.java:53) ... 15 more How large heap have you set? I see that you have allocated 3G for memory mapping that leaves about 512M max left for heap size since OS (and other on OS processes) needs some memory. I have not seen this stacktrace on Linux (used to happen a lot on 32-bit windows versions since the 2G continuous map limit really wasn't 2G). Try lower nodestore memory mapped settings (check how large file is, should not be 1GByte?) and see if that helps. Regards, -Johan ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] Dijkstra search on a big graph
Hello Johan, Thanks for your answer see my answers below: On 8 February 2010 11:15, Johan Svensson jo...@neotechnology.com wrote: Hi, How large heap have you set? I see that you have allocated 3G for memory mapping that leaves about 512M max left for heap size since OS (and other on OS processes) needs some memory. Yes, I've set 3G for memory mapping, but application allocated only 1.8G, that leaves enough memory for OS, imho. Anyway, changing parameters of property file 1G - 500M (so max allocated memory should be 1.5G instead of 3G) changes nothing. I've got the same exceptions. I have not seen this stacktrace on Linux (used to happen a lot on 32-bit windows versions since the 2G continuous map limit really wasn't 2G). I use 64-bit PC if this matters. Try lower nodestore memory mapped settings (check how large file is, should not be 1GByte?) and see if that helps. As described above - using any setting values has no influence on my app. To be sure, I can say that small routes are found pretty fine, without any exceptions. What file you are talking about? Regards, -Johan ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Best regards, Popov Anton ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
