Hi Luanne, It's hard to answer your question, but I will try it..
*When you create relationships, are the nodes on either end already persisted?* Almost never.. It might happen that some of the nodes are already persisted and also that all are new.. But how would I save "only the relationship", saying I have both of nodes saved with depth 0, how would I implement to save only the relationship, as in my entity object I have Sets referring to the "connected" nodes? *Or are you creating both new nodes and relationships to those in one go via the save with depth -1?* Yes often I am creating at same time new nodes and relationships. I feel like there is something with respect to this question, should I clearly separate the saving of nodes and relationships? *How many relationships approximately are created via a single save?* I can only give you app. estimate, so let's say 10-15.. Any idea? On Wednesday, November 18, 2015 at 4:22:47 AM UTC+1, Luanne wrote: > > Hi Ivan, > > When you create relationships, are the nodes on either end already > persisted? Or are you creating both new nodes and relationships to those in > one go via the save with depth -1? How many relationships approximately are > created via a single save? > > -Luanne > > On Wed, Nov 18, 2015 at 6:16 AM, Michael Hunger < > [email protected] <javascript:>> wrote: > >> Can you try neo4j-ogm 1.1.4-SNAPSHOT >> >> You might need to add m2.neo4j.org as maven repository with snapshots >> enabeld. >> >> I think it has some fixes in this regard. >> >> Michael >> >> Am 17.11.2015 um 17:12 schrieb Ivan Senic <[email protected] >> <javascript:>>: >> >> Hi, >> >> I am quite new to neoj4 and I started using it with the neo4j-ogm to map >> my java objects into the graph and back. I am experiencing quite a strange >> behavior when I start saving entities via OGM into the graph. It seams that >> the memory usage rises fast on the neo4j-server (I also experienced few OOM >> Exceptions): >> >> >> <https://lh3.googleusercontent.com/-ydCCbXByqXo/VktNm-PHijI/AAAAAAAAAG8/xp9AKbOwiqw/s1600/neo4j.png> >> >> >> <https://lh3.googleusercontent.com/-_wMShgRo8RE/VktNhEFxoPI/AAAAAAAAAG0/YdVArB8EzkU/s1600/neo4jGoesOutOfMemory.png> >> >> >> >> As you can see from screens the memory rises up in terms of the seconds. >> I started by saving with depth of 1 (behavior described by pic1) and then >> also tried with depth -1 (that's pic 2 where I always hit OOM exception)., >> It's important to mention that saving is also very slow, making some of my >> requests time-out (with 3 seconds time out).. Setting the depth to 0 works >> as expected (in terms of memory and speed), but then I get no relationships >> in the graph. >> >> >> The interesting thing is that I am not saving too much data at all. In my >> use-case I end up with about 6k nodes and 6k relationships when all >> requests are processed. Imo that's nothing for the neo4j, thus I am >> surprised I am seeing this. >> >> >> With the graph I am trying to represent all the classes (interfaces, >> annotations, methods, etc) that are loaded in the JVM by starting a small >> example application. So with every new class being loaded I need to update >> the graph in order to store information I can read from the byte-code. >> >> >> The only "special" thing might be that I have a lot of bi-directional >> relationships (for example class implements interface, interface is >> realized by class) .. Here are some screens of my graph: >> >> >> >> <https://lh3.googleusercontent.com/-_Ew1FYyCCMY/VktQwWRY4GI/AAAAAAAAAHQ/2SoTJZzuIoU/s1600/neo2.png> >> >> >> <https://lh3.googleusercontent.com/-42s8twVJgyI/VktQtfxQIXI/AAAAAAAAAHI/I9D4w5byjaE/s1600/neo1.png> >> >> >> It must be that I am doing something wrong.. And it has to be related to >> the OGM.. It can not be that saving such a small number of nodes pushes the >> memory so high.. >> >> Here are some more information about my setup: neo4j 2.3.0, neo44-ogm >> 1.1.3, Ubuntu 14.04, JDK 1.7.0_70. I have no special settings than the >> default ones. >> >> Any help would be great.. >> >> >> -- >> 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] <javascript:>. >> For more options, visit 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] <javascript:>. >> For more options, visit 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.
