About performance

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Company

... Software is the market leader in providing a very high performance persistence solution for Java, based on the Java Persistence API ... start-ups, governments and defence forces. When database performance matters - ObjectDB Software provides the most effective solution. ...

 
forum_thread

Duplicate a table

Hello, I would like to know if it's possible to copy the content of a table representing one class of object to another table whithout having to use java object (no object instantiation) ? In fact, I would like to execute a native query like "select * into T0 from T1" My purpose is to backup a table before erasing the content. Thanks. ... code for this purpose. Use enhanced classes to get best performance in reading and writing the objects. The impact of object instantiation on performance should be minor. ObjectDB Support ...

 
forum_thread

Is 2 level cache in use?

Hi, Is there any way to check, if 2 level cache is in use? Right now I've done two things: 1. objectdb.conf with cache size is placed in WEB-INF directory of my web application. 2. persistence.xml was modified with: ... few benchmarks I don't really see any difference in performance. ODB on server uses the same amount of CPU and memory. I'm ... is cached. The L2 cache doesn't always improve performance. It depends on the application. Sometimes enabling the L2 cache may ...

 
forum_thread

Evaluating ObjectDB for SaaS Application

We are currently evaluating objectdb for our SaaS(multi-tenant) product. It is a data intensive health care product . We would like to know the horizontal scalability options available. ... of one writer and multiple readers provides better performance because the coordination between the servers  is simpler and ... but it provides other advantages including better performance, full ACID, richer queries and rapid development. ...

 
api-jpa

javax.persistence.InheritanceType

Defines inheritance strategy options.(Enum of JPA)

 
api-jpa

javax.persistence.criteria.SetJoin

The SetJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a java.util.Set.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.MapJoin

The MapJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a java.util.Map.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.Expression

Type for query expressions.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.CriteriaBuilder.Case

Interface used to build general case expressions.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.CriteriaBuilder.Coalesce

Interface used to build coalesce expressions.(Interface of JPA)