About performance

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Manual
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FROM clause (JPQL / Criteria API)

could also cause performance problems. For example, let's look at the following query execution and result ... of the referenced Capital objects is performed one at a time, i.e. the number of round trips
Manual
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Setting and Tuning of JPA Queries

); Flushing changes to the database before every query execution affects performance significantly. Therefore, when performance is important, this issue has to be considered. Lock Mode (setLockMode) ObjectDB
Manual
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SELECT clause (JPQL / Criteria API)

. Specifying the required query results more precisely can improve performance and in some cases ... filters duplicate results. Filtering duplicate results might have some effect on performance
Manual
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Database Connection using JPA

functionality for performing operations on a database. Many applications require multiple database connections ... ) must be performed within an active transaction. The EntityTransaction interface represents and manages database
Manual
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Locking in JPA

is being performed on an old version of a database object, for which another update has already been committed ... (relative to a retrieval followed by a separate lock), these methods perform retrieval and locking as
FAQ
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Is ObjectDB better than Object Relational Mapping (ORM)?

As noted above, using ObjectDB instead of a relational database and ORM combination is easier and leads to better performance. ORM tools, however, are very useful where the use of a relational ... of both worlds - use ObjectDB when applicable for faster development and better performance and use
Result
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Consulting and Training

Our consulting and training team will be happy to assist you with on-site or remote consulting and training services. Consulting Facing a migration project? Performance issues with your current ... depth from the very basics up to advanced topics, performance tuning and production tools. This course
Manual
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Entity Management Settings

can manage non enhanced classes by using reflection at the cost of performance. The possible values ... , and loading their persistent content lazily, when they are accessed, could improve performance
Result
8

Apache License, Version 2.0, January 2004

of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative
Manual
8

GROUP BY and HAVING clauses

.continents GROUP BY c.currency Because grouping is performed in this query on a path expression