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Commit Frequency

The defragmentation system uses db4o's transactional core to write the data to the new defragmented file. For large databases managing a long transaction can become an issue and can slow down the defragmentation. Therefore you can set a commit frequency. This means after the set number of processed objects the transaction is committed on the new file.

DefragmentConfig config = new DefragmentConfig("database.db4o");
config.objectCommitFrequency(10000);

Defragment.defrag(config);
DefragmentationConfigurationExamples.java: Set the commit frequency