Where is the network memory object?

Hello,
I have a performance problem.
I wrote a logical network in the spatial database with around 120.000 links and 100.000 nodes.
I can read the network through SDO_NET_MEM PL/SQL but I cant read it through the Java API. I get an OutofMemory error.
I tried to increase the JVM size through the IDE I'm using (eclipse) but it had no effect at all.
I read that the Java API and the SDO_NET_MEM package use the network memory object which is a cache in a virtual memory. How can I adjust the size of this cache?
Cheers,
Elif

see post :
Re: Network analysis performance issue
you have to manage your java memory to run your java client and there is also a java memory space in the oracle server that you can increase with SDO_TOPO_MAP.SET_MAX_MEMORY_SIZE(value)
value is in bytes (not in kb like the documentation says!!!)

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When loading Spatial Network into memory where is the actual memory occupied? On client or server side?
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I found this thread and I thought I may add my experiments :
I've been playing with networks in 10g and ended up with these points :
I programmed some PL-SQL functions based on the SDO_NET_MEM api (I mostly use shortest_path and TSP functions). Everything was fine until I decided to "industrialize" the process :
I was originally working on small networks (around 30000 edges) and got pretty good results.Then, I started loading bigger networks (500 000 edges). At this point, memory was still OK but I encountered some really weird performance drops : Using the oracle network editor which is external to the database, shortest paths computations were fast, but inside my pl-sql code, these functions were taking much more time to complete.
I found out that the javavm inside Oracle was not optimized for calculation compared to the Sun runtime and that could explain my performance problems.
The following thread gives more details about this :
Spatial : big performance differences between server and client java calls
Anyway, I decided to test my procedure with really big networks (9 million edges, 7 million nodes). I never could load the network -> I got the outofmemory error.
My server is running under dedicated mode and I have 4gb of ram.
I tried several configurations :
I first set JAVA_POOL to 1.8 GB inside the SGA, in vain.
Then, I started to understand it had something to do with PGA so I reduced SGA and increased PGA up to 2BG. It failed.
I'm now completely stucked :
- JVM does not give as good results as on the client side :(
- Big networks don't load inside database memory.
My questions are (hopefully one could answer) :
Are there any means to estimate the size of a "loaded in memory" network, given the number of edges and nodes and then configure oracle memory areas ?
Why is the oracle javavm so bad, can we tune it ?
Should I definitively envisage to re-develop my program as a java client and simply use Oracle to store my data ?
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Message was edited by: hammong

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Restated this way, is the solution correct ???

Where is the network memory object?

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