One of the common questions when analyzing a slow application is if there are any slow database queries. You can, of course, monitor these queries on your database. But then you still need to match them with a part of your Java code. And because there is no easy way to see what happened immediately…
Optimizing the performance of your application is a complex and application-specific task. All domain models are different, and often enough, the amount of data managed by them also differs significantly between multiple installations. In addition to that, almost all performance tuning techniques have trade-offs, which don’t make them a great fit for all situations. Because…
Hibernate needs to ensure that all tables referenced in a query are up to date before executing the query. That means it has to flush all pending changes for these tables before it runs the query. Otherwise, the database would process the query on an outdated data set and return wrong results. Hibernate not only…
To connect your persistence layer to your database, you need to configure a data source or provide the JDBC connection driver, URL, and login information to Hibernate directly. In addition to that, Hibernate needs to know the database-specific dialect it shall use to generate the SQL statements. Hibernate can detect the dialect based on the…
Like most Java developers, you probably use Hibernate directly or via Spring Data JPA to implement your application’s persistence layer. In general, this works very well for most use cases, but it causes some issues if you need to implement a batch job. This is because Hibernate, like most object-relational mapping frameworks, maps each database…
