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Appendix A: Monitoring with Java Flight Recorder

Hibernate can provide an integration with Java Flight Recorder in order to monitor low level events. The Events that can be monitored are :

  • org.hibernate.orm.SessionOpen and org.hibernate.orm.SessionClosed to respectively monitor the opening and closing of a Hibernate Session

  • org.hibernate.orm.JdbcConnectionAcquisition and org.hibernate.orm.JdbcConnectionRelease to respectively monitor the acquisition and release of a JDBC connection

  • org.hibernate.orm.JdbcPreparedStatementCreation and org.hibernate.orm.JdbcPreparedStatementExecution to respectively monitor PreparedStatements creation and execution

  • org.hibernate.orm.JdbcBatchExecution to monitor batching execution

  • org.hibernate.orm.CachePut and org.hibernate.orm.CacheGet to respectively monitor second level cache PUT and GET operations

  • org.hibernate.orm.FlushEvent to monitor flush execution and org.hibernate.orm.PartialFlushEvent to monitor a partial flush execution

  • org.hibernate.orm.DirtyCalculationEvent to monitor dirty check calculations

Important

To use the Java Flight Recorder integration, the application must include the hibernate-jfr jar on the classpath
Note

The hibernate-jfr integration requires a JDK 17 supporting JFR events. It should also work with a JDK 11 supporting JFR events, but we haven’t tested it .