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find() cost unreasonable time!

have not test your plan even it sounds good. However, my situation is multiple clients maintaining

Problem with distinct select, order by and equivalent alias/attribute path

it must follow these restrictions, otherwise the same result may have multiple different order values.

Soft Reference Object Cache Recommendation

multiple full GCs (via the option in JavaVisualVm on the Memory Tab).  Gigabytes of RAM was freed

enumeration table? how to on pure jpa?

properties using multiple entity objects of that class. The key

Optimization Question

at any given time, but then that defeats the whole point of having multiple threads.

Evaluating ObjectDB for SaaS Application

of one writer and multiple readers provides better performance because the coordination between

Performance issue in a query due to compareTo calls

= ? JOIN queries are always slower because multiple entities are involved.

Is it possible to using JDO and distributed transaction?

I'am new to study JDO. Can and How I use JDO an distributed transaction?(multiple database)。 Is ObjectDB also provided JCA util just like DataNucleus? Reference：

Close() Method of EMF throwing "PersistenceException: Connection is closed" on first attempt to close.

We encountered an issue that caused an outage last Friday on multiple ObjectDb server instances. The problem occurred while trying to close the EMF to three separate ODB databases, residing on different ObjectDb Servers,  the exceptions were thrown on two of our servers

ODB-FileWriter holds unecessary entity reference after transaction and entity manager are closed

;many different databases? single class loader or multiple class loaders? Please verify