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Storing a tree of data (depth=3)

(I've tried @OneToMany, @Embedded and @ElementList) A role is a performer (I've tried inside that class ... comment out the role part) One intention is that performer finally results in a separate table so I can query the list over all performers. When I'm trying to persist the movie the objectdb complains

One transaction or two?

performance. I don't expect a large difference but you may want to try both options ... appreciable difference in performance so I think I'm just going to leave it as a single transaction ... . Each task then gets a Persistence Manager from the factory, performs its transaction and then closes

Pre-detach loading: retrieval by navigation not working in if statement

-query @EJB with a specific loader that - after the em.find(id) is performed - executes selected ... me ages to finally find/identify this problem, as I did not imagine that performing the load access ... (); if (presentValue != null) {//Known to in fact be 'true' in database //Perform some

Occasionally slow requests in load testing

We are running load testing against objectdb version 2.3.7_18. The performance is generally OK, however there are quite a few "spikes" in the performance where we are getting a lot of very slow ... queries. We are running load test with uniform set of queries and the performance is OK in some cases

EM.find() is suddenly slower

We have a new performance bottleneck, if we use EM.find() on the same entity type 10.000 times in ... times we cannot see a performance bottleneck. @Entity public class EntityA { @Id @Access ... eager fetch that affects the performance of further operations. Could you please check build 2.8.6

Schema Update large refactoring

Hello, we want to perform a major refactoring of our package names and hence need ... , if it is possible to perform some sort of wildcard schema update, instead of specifying all the thousands ... , will there be any limit to the number of packages that we can specify? Will the number impact performance

Blocked by find

, this may just be slow performance rather than blocking. The attached test writes data to a db ... to maximise objectdb performance it'd be appreciated. felixobjectdb Richard Szurgot Extremely slow performance may be the result of using zero size page cache, which causes cache purge to be invoked

cannot delete objects after crash (see issue 2283)

Support thanks, we'll adapt accordingly hgzwicker Hans-Georg Zwicker Please monitor performance ... failure with lower performance hit. support Support ok hgzwicker Hans-Georg Zwicker our performance ... , and performing one sync of the recovery file before writing a group of updates to the physical database


is to be considered read-only. ReadOnly set to false specifies that no updates can be performed


Method javax.jdo.spi.PersistenceCapable PersistenceCapable jdoNewInstance( StateManager sm ) Return a new instance of this class, with the jdoStateManager set to the parameter, and jdoFlags set to LOAD_REQUIRED. This method is used as a performance optimization as an alternative to using reflection

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