Identity Manager writes immutable audit records to the audit log to serve as a historical audit trail of the operations it performs. Identity Manager uses these records in certain reports, and the data from the records may be displayed in the administrator interface. However, because the audit log grows without bounds and it grows at a modest rate, the deployer must determine when to truncate the audit log. Before Data Exporter, if you wanted to preserve the records prior to truncation, you were forced to dump the tables from the repository. If Data Exporter is enabled and configured to export log records, then the old records are preserved in the warehouse, and Identity Manager may truncate the audit tables as needed.