About Maintenance Logs

The first time you load data into a cube or cube dimension, OLAP creates several log tables. The tables in the same schema as the analytic workspace. OLAP queries these tables to generate reports. These reports are listed in the OLAP Build Reports subfolder under the OLAP Reports folder in the Reports navigator. The default names of the tables are the following:

• CUBE_BUILD_LOG: This table is used to generate the most of the reports, such as the Build Log for All Builds report, which contains information about what happened during a build. Use this report to determine whether the build produced the results that you were expecting, and if not, why not. The log is continually updated whenever a cube or dimension is refreshed. You can query the log at any time to evaluate the progress of the build and to estimate the time to completion.

• CUBE_DIMENSION_COMPILE: This table is used to generate the Dimension Compile Log for All Builds report, which contains errors that occur during the validation of the dimension hierarchies when OLAP is aggregating a cube.

• CUBE_OPERATIONS_LOG: This table is used to generate the Detail Log for All Builds, which contains messages and debugging information for all OLAP engine events.

• CUBE_REJECTED_RECORDS: This table is used to generate the Rejected Records Log for All Builds, which identifies any records that were rejected because they did not meet the expected format.

These logs enable you to track the progress of long running processes, then use the results to profile performance characteristics. They provide information to help you diagnose and remedy problems that may occur during development and maintenance of a cube. They also help diagnose performance problems in querying cubes. You can query the tables using any SQL interface.

You can also run the $ORACLE_HOME/olap/admin/utlolaplog.sql script to create the build log with some useful views.