About configuration

forum_thread

Degrading performance overtime

hi, We have an application that uses embedded odb database. We have configured odb to start at 50meg chunks and grow at 50 megs a time. as the files become larger between 1 and 2 gigs we start to see considerable degrade in performance caused internal objectdb locking: ... None our conf: <!-- ObjectDB Configuration -->   <objectdb >   <general > ...

 
tutorial

Step 5: Add a JSP Page

Explains how to add a JSP to an Eclipse Spring MVC JPA web application project.... the last in this tutorial) is setting the  Spring XML configuration . ...

 
forum_thread

Server closes if large query runs out of memory

We are using ObjectDB in production, and have found what we thing to be a serious problem:  the objectdb server can run out of memory and stop if a query deals with too many objects. This isn't the behaviour we expected for a product that we want to use to deliver 24/7 high-volume data collection. ObjectDB surely has some idea of the sizes of objects that it persists and retrieves, and so should be able to fail safely if it finds too many objects being retrieved to fit into memory. There must be some alternative to crashing! ... crude for some people, how about making it a non-default configuration option?  edit ... crash is often the result. So ObjectDB users must use a configuration that will keep sufficient reserve of Java heap space in any ...

 
forum_thread

Optimistic lock failed

Hi, I frequently see exceptions during development such as com.objectdb.o._RollbackException: Failed to commit transaction: Optimistic lock failed for object com.example.MyEntity#3 (object has version 1 instead of 3) Could you please explain what this means, and what I can do about it. Thanks you, Carl     ... You can disable optimistic locking and exceptions in the configuration: <database > <size ... in next versions. Update:  The configuration above is now documented and part of ObjectDB 2.1. ...

 
release

2.6.1

... to TRACE  ( issue #88 ). Changed main configuration elements from required to optional. Fixed the ... Fixed evaluation of $temp in the configuration file. Version 2.2.9 Added new configuration to enable / disable auto serialization of non persistable types ...

 
forum_thread

Java 6/7 Performance Comparison

Hey, I've been using ObjectDB for a small scale home project to gain some familiarity before proposing it in a commercial project at work. What I've noticed though is that when using objectdb in embedded mode based on the console tutorial, there seems to be a bit of a performance gap running the same code between Java 6 & 7 Tracing it through I can see the bottle neck seems to be at the creation of the entity manager and I was wondering if there are any additional configuration options I may have missed while running under java 7. ... manager and I was wondering if there are any additional configuration options I may have missed while running under java 7. ... dev machine and see similar results, both with the default configuration when downloaded and then again after adjusting ...

 
forum_thread

errors on repair

we are using version 2.6.7. On running the doctor we have message like free page list broken ... unexpected total page count ... what could be the reason for this ?   ... situation a bit more: - as you can see from the configuration we are using the (unofficial) combined embedded/server mode. The ... 2016-04-12 16:32 The configuration looks fine. We will need either a test case or your full ...

 
tutorial

Step 5: Add a JSP Page

Explains how to add a JSP to a NetBeans Spring MVC JPA web application project.... the last in this tutorial) is setting the Spring XML configuration . ...

 
release

2.6.0

... to TRACE  ( issue #88 ). Changed main configuration elements from required to optional. Fixed the ... Fixed evaluation of $temp in the configuration file. Version 2.2.9 Added new configuration to enable / disable auto serialization of non persistable types ...

 
release

2.5.7

... to TRACE  ( issue #88 ). Changed main configuration elements from required to optional. Fixed the ... Fixed evaluation of $temp in the configuration file. Version 2.2.9 Added new configuration to enable / disable auto serialization of non persistable types ...