IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Administrator's Guide > Tivoli Common Reporting
IBM Tivoli Monitoring, Version 6.3 Fix Pack 2
Limitations
The limitations of the reports produced by Tivoli Common Reporting are described in this section.
- The Tivoli Monitoring agent Cognos reports are coded to connect to a data connection in Tivoli Common Reporting with the name TDW.
- Tivoli Monitoring agent reports run against the Tivoli Data Warehouse. DB2 limits the length of columns to 30 characters. Because the Tivoli Data Warehouse uses attribute group names as the column headers, attribute names longer than 30 characters in a DB2 Tivoli Data Warehouse are replaced with the internal column name, abbreviated database name for the attribute (for example, CPU_UTIL or DISK_UTIL rather than CPU Utilization or Disk Utilization).
- Reports that cover a long time period or a processing-intensive attribute might cause SQL arithmetic overflow.
- Some of the reports do not support the Tivoli Data Warehouse Summarization and Pruning agent optional definition of shift hours. Customers can use shift hour support to flag collected data as being either Peak or Off-Peak periods. However, some reports include all data collected between the customer-selected report start and end times, whether that data was collected during Peak or Off-Peak periods. See About the Summarization and Pruning agent and Change global configuration settings.
- If the Summarization and Pruning agent shift hours configuration is changed, the most recent configuration is used for reporting. If you specify a date range for an availability report that crosses multiple configurations, the availability metrics might be incorrect. For example, if you edited the peak hours to add one hour, the summarization for peak hours and off-peak hours are different before and after the time when the agent was reconfigured. Only time ranges before or after the reconfiguration are valid and you should avoid specifying a time range that crosses two configurations.
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Tivoli Common Reporting