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Degrading performance overtime

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Delete object from collection versus delete from JPQL

I'm a newbie, so this is a pretty fundamental question. I'm not sure if there is a bi-directional relationship between the objects in memory and ObjectDB.  I know I can modify the objects and use persist() to write them to the database.  But does running a JPQL update or delete alter the in-memory
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em.flush(); em.clear(); loosing data and not persisting managed objects

and defects are stored in a database. Each table has hundreds of thousands of entries. I'm trying to write
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Embedded in JDO metadata not working in objectDB 2.x ?

you will have to write a small program that retrieves all the relevant containing entity objects
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Error reading UTF string (Serialized Objects in Explorer)

after retrieving the BeitragVertragArt class, changing some fields and writing it back? The fix in _14
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Error when trying to open the Explorer (failed to find Java VM)

Hi, I use windows 7 64 bit version. When I'm trying to open the ObjectdB explorer I get this windows error: "Failed to find Java VM".   What is the problem? Have you tried both explorer.exe and explorer-b.exe? Can you write it from the console: > java -jar explorer.jar On windows: both explorer
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Evaluating ObjectDB for SaaS Application

We are currently evaluating objectdb for our SaaS(multi-tenant) product. It is a data intensive health care product . We would like to know the horizontal scalability options available. Horizontal scalability may be achieved by using replication. Thanks for the reply.  Why is write limited
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Evaluation License

developing open source tools, writing (tutorials, articles, blog posts), giving lectures
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evictAll() behavior

I'm writing a multi-user drawing tool, using objectdb as the central store.  When a user press F5, I want to pick up all the changes from the database.  So, I call evictAll() in the following ways: pmf.getDataStoreCache().evictAll(); // the factory pm.evictAll
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Externalising persistence.xml properties in Glassfish?

about I can write up an example if you still have problems.   Erick Hi again,   Thanks for the replies