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17

Soft Reference Object Cache Recommendation

(via the option in JavaVisualVm on the Memory Tab). Gigabytes of RAM was freed up, and the screenshot shows ... that if I delete the JdoBlob2 via persistenceManager.deletePersisted(jdoBlob2) then the memory gets freed by the next full GC. I can also close the PersistenceManager and all the memory then can be freed
16

virtual servers and one file

to memory mapped files, which are usually more efficient. It is unclear, however, if this will solve ... remote sessions. As far as I understand it is not the problem of less memory of the physical or ... ) not completly loadet in memory and the virtualisation software tries to make a prediction
13

Objectdb server out of heap space

where it runs out of memory like this. This could be a serious problem for out deployment ... of its resources, and so should never end up in a situation where it runs out of memory like this. Servers ... . support Support I'm well aware of VM options for tuning memory. A server process
13

Duplicatable and Disposable JPA Repository for Unit Testing

Hi Folks, I seek an in-memory JPA implementation which can be easily instantiated, populated ... , Robin. robinroos Robin Roos Currently ObjectDB does not support pure memory storage, but you can run it on a RAM drive to get the effect of a memory database. It would probably be faster than any
13

Caching/Paging Questions...

the results in memory somehow, would that speed up the execution of the second query since many of its result objects already created and reside in memory ? Q2: Do I need to manually use strong ... and keep them in memory longer automatically somehow before GC takes place ? Q3: What is the maximum memory
11

Cascading makeTransient

Hi! We have a memory leak in our app because of ObjectDBs __odbTracker fields. The situation ... the memory and it represents additional unwanted memory consumption. I tried to solve that via calling pm ... now. I will check our memory-leak issue in the profiler with our real app later with this build. Thank you very much! jakab Gergely Jakab
11

Does ObjectDB create one instance of each entity class on (web app) load ?

is present in memory, at web app startup, before I've loaded anything, and they won't garbage collect. (I've ... , if the abstract entity class is com.example.Common then there is exactly one instance in memory ... retained in memory. Luckily, although I have a lot of entity classes, as far as I can tell, the delegate
11

large numbers of records

, but obviously slower than when using a small database that can be cached entirely in memory ... system memory. Is this size of database file supported in-memory on ObjectDB. We have a server with persistent RAM so there is no problem of data loss. peric.emil Emil Perić ObjectDB supports pure memory
3

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

Hello, we've encountered a problem leading to memory leaks. We found that after closing ... the application context. This prevents the garbage collector from cleaning up the memory which eventually results in memory leaks. The attached screenshot shows an example of this behaviour. Thanks
3

each 1-2 days objects on some objectdb level lock/block each other

03 seems to have a memory leak, we had to shut down now the complete system on 60 GByte RAM used. Again, we did not change anything on our side, there was no memory leak till that version hgzwicker ... for that. How can we go on with the improvements ? hgzwicker Hans-Georg Zwicker > the version 03 seems to have a memory leak Sorry to hear

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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