The second two parameters refer to the number of index and data pages, respectively, that will be cached by the BTree. You can try altering these to see how performance is affected.
EJB/J2EE FAQ (v1
If you use a different BTree you may want to change these parameters to reflect the size of your new datasets and to experiment with the performance of the BTree. Remember that your cache is using VM memory so a very big cache may start to generate OutOfMemory exceptions and you may have to increase the amount of memory available to your VM. As the cache is primed on the initialization of the single instance using the loadmem method a very large cache may slow this initialization.
You can comment out the call to loadmem if you wish and each page will then be cached as it is used.
Using the JMS API in a J2EE Application
Obviously if this is a BTree that you have created yourself using the Virtual Machinery implementation you will know the numbers of index and data pages in the BTree. Data Pages tree contains less than 4. Data Pages tree contains more than 4. Rebuilding and re-deploying the sample application If you change any of the java files you will have to recompile the code and rebuild using the -.
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If you have changed the. These permissions are generally held in a. You can also find details about Virtual Machinery's BTree implementation here. Java EE includes several specifications that serve different purposes, like generating web pages, reading and writing from a database in a transactional way, managing distributed queues. In an attempt to limit the footprint of web containers, both in physical and in conceptual terms, the web profile was created, a subset of the Java EE specifications. The Java EE web profile comprises the following:. Although by definition all Java EE implementations provide the same base level of technologies namely, the Java EE spec and the associated APIs , they can differ considerably with respect to extra features like connectors , clustering , fault tolerance , high availability , security , etc.
The code sample shown below demonstrates how various technologies in Java EE 7 are used together to build a web form for editing a user. The example below uses JSF and Facelets. The example below uses both these technologies. From Wikipedia, the free encyclopedia. This article has multiple issues.
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