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Is 2 level cache in use?

performance. ODB on server uses the same amount of CPU and memory. I'm calling the same url in benchmark ... and then check if it is cached. The L2 cache doesn't always improve performance. It depends

find() cost unreasonable time!

that the bidirectional relationship was converted to 2 unidirectional relationships - the performance is incomparable ... one bidirectional relationship to two unidirectional relationships to improve performance. > BTW

Type xxx is not found (error 301)

(and put this under META-INF) 2) em.fund (User.class, User.class) 3) use jdo from jpa - is there a performance penalty ... - is there a performance penalty for unwrapping PersistenceManager.class ? No - it is merely casting. > Am not seeing

Evaluating ObjectDB for SaaS Application

readers provides better performance because the coordination between the servers is simpler and requires ... such as other popular NoSQL solutions, but it provides other advantages including better performance

Database Files

behaviour is to delay writing to the odb file in order to improve the performance. As long as the data ... you can enable <processing ... synchronized="true" />, but is is expected to decrease the performance

High availability and other pratical questions

DB seems to be with superior performance would you recommend using it with TomEE+ instead ... the main Tomcat server will improve performance. You should be able to access embedded ObjectDB

Navigation to Collection Elements

, because it is not JPA/JDO portable (it is an extension of ObjectDB) and it also leads to performance penalty ... . How about arrays like x.array[1] and x.array[1][2] ? If such navigations in queries lead to performance

Database size is much larger than expected (x2)

input data, how to test the real performance of objectdb? The structure of my class is <URI>::=(<sUrl ... the performance of ObjectDB with real data. But if there is a problem you will have to isolate it in order

Indexing a field results in internal Exception

I have an application that I have been converting from JPA/MySQL to JDO/ObjectDB and I have hit a problem with indexing. An index on a String field is required to give good performance but if I add ... , and newer versions, as we have had positive experiences of the performances of object databases and JDO

Memory leak in com.objectdb.o.CST

. Perhaps there is some performance tradoff with this update to save memory usage? In the attached ... ) and see if there's a performance difference. Trianglehead Json Error Just an update, after a couple hours of using latest

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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