| Apache OpenJPA - README.txt |
| Licensed under Apache License 2.0 - http://www.apache.org/licenses/LICENSE-2.0 |
| -------------------------------------------------------------------------------- |
| |
| Open JPA Fetch Statistics Tool monitors persistent field access and determines which fields are never used. This tool |
| can be used to help tune an application. |
| |
| Note: Open JPA Fetching Statistics Tool works with the runtime enhancement. |
| |
| JSE usage instructions: |
| |
| 1.] Configuration |
| * Append the path of openjpa-fetch-statistics-[version].jar file to the classpath prior to lanuching the JVM. |
| |
| 2.] Statistics Collecting and Monitoring |
| * When this tool is configured, it will be active for all persistence units in the JVM. Statistics will be dumped via the |
| openjpa.Runtime channel with the INFO level every 10 minutes, or when the JVM terminates. Any field that is logged |
| has not been accessed by an application. |
| |
| 3.] Configuration removal |
| * Stop the JVM. |
| * Remove openjpa-fetch-statistics-[version].jar from the classpath. |
| |
| Performance Consideration |
| |
| There will be a large performance impact when running this tooling. It is not supported, nor recommended for production |
| use. This tool should not be used on a production machine. |
| |
