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How to use JOIN FETCH?

referenced in the FETCH clause is null.  To get the object graph I want is going to incur the N+1
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Index causes increased memory usage

are the entries in the page cache cleared out?  Or do they remain?  Our jvisualvm memory graphs
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Lazy Init / Eager / Join Fetch collection strategy ? What to choose ?

more details in the JDO specification). This ability became available also in JPA 2.1 (as entity graphs
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Left join fetch behaviour doesn't retrieve children?

is not enough mature in objectdb to use in a production environment. I'm waiting for JPA entity graph
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Multi-Threading/Distributed-Database Questions...

objects on both, i.e. distributed database/graph of objects ? Kind Regards and Thanks ! Activity
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Optimization Question

. Still, you will have to manage the object IDs in order to merge a graph of objects that use existing object IDs
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Remove not working

the graph to delete but it still didn't work. As you can see my testcase does nothing other than retrieving
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Schema or odb file compare

Dear Support, is there a way to compare two schemas or odb files? I try to compare two object graphs Thx This is currently not supported, but you may file a feature request if you need this ability (describing what exactly you expect from this new feature, and how it should work). PG
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Server vs embedded mode in multi-instance scenario

for system resources (cpu time, memory, etc). Is that a valid concern? The graphs on your site would seem to say
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stored procedure in ObjectDB

, such as linked-list, tree, graph, then a lot of round trips occurs, the traffic is not the main factor, but the latency is a problem.     TIA gzdillon