About performance

forum_thread

Type xxx is not found (error 301)

The error: Type User is not found (error 301) occurs when I query the db for a type before any instances of that type have been persisted, e.g.: return em.createQuery ("SELECT a FROM User a").getResultList (); What I was expecting was an empty list, not an error. Is there some enhancement that should be done beforehand?  ... User.class) 3) use jdo from jpa - is there a performance penalty for unwrapping PersistenceManager.class ? ... > 3) use jdo from jpa - is there a performance penalty for unwrapping PersistenceManager.class ? No - it is ...

 
release

2.0.5

... also inactive (new) indexes. Improved performance of database insert/update/delete operations. Changed default configuration (for improved performance). Added support for running a server with no tray ...

 
release

2.0.3

... also inactive (new) indexes. Improved performance of database insert/update/delete operations. Changed default configuration (for improved performance). Added support for running a server with no tray ...

 
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Object DB vs EclipseLink/TopLink: Unloaded relationships in detached entities

This topic is for those considering migrating from EclipseLink JPA or TopLink to ObjectDB JPA. ... desired collections (which requires some re-coding and has performance consequences when large relationship hierarchies are involved) to ...

 
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Using Scala collections with ObjectDB

Hi, I cannot see that it is possible to make scala collection classes persistable within ObjectDB. Am I missing something or must  ObjectDB Software Ltd do a specific incorporation of the scala.collection._  api for it to work ? (http://www.scala-lang.org/docu/files/collections-api/collections.html)   /Peter   ... within ObjectDB?  We want to leverage the high performance of ObjectDB for an embedded database but want to avoid introducing ... with Scala collections using properties. The effect on performance is expected to be minimal. ObjectDB ...

 
release

2.3.2

... operations of large objects. Improved the performance of navigation through an inverse (mapped by) field if the owner ... in criteria queries . Improved Explorer performance by disabling EAGER fetch. Fixed critical bugs in ...

 
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index - data rewrite

Hi we have found that applying indexes on an existing table erases the data. Are we doing something wrong. Thanks ... indexing. We found a solution for this past performance problem and didnt try with indexes any more until now when we have another performance issue which we believe indexes should solve. We will make ...

 
release

2.0.4

... also inactive (new) indexes. Improved performance of database insert/update/delete operations. Changed default configuration (for improved performance). Added support for running a server with no tray ...

 
release

2.0.2

... also inactive (new) indexes. Improved performance of database insert/update/delete operations. Changed default configuration (for improved performance). Added support for running a server with no tray ...

 
release

2.2.6

... in criteria queries . Improved Explorer performance by disabling EAGER fetch. Fixed critical bugs in ... such as List<String> ). Improved performance of eager fetch in queries. Added Maven build ...