Near-term history information

OMEGAMONĀ® for Db2 PE shows near-term history information about statistics and thread activities that were completed in the near past (opposed to snapshot information, which is periodically gathered and might even report information about currently active tasks).

Near-term history information is gathered and stored by the Near-Term History Data Collector of OMEGAMON for Db2 PE. Up to 96 intervals of recent Db2 activities can be stored. OMEGAMON for Db2 PE continuously deletes the oldest data to maintain the most recent intervals. The Configuration Tool is used to specify the intervals per hour and the maximum number of hours that data should be gathered and stored.

Note: To view near-term history information online, the Near-Term History Data Collector must be running. For instructions on starting the Near-Term History Data Collector, see Configuration and Customization.

There are two panels for each type (for example, buffer pool) of near-term history data. One panel provides information for all the report intervals in storage. The other panel can be used to zoom in on one interval at a time for detailed information.

Near-term history data is stored in main memory, so it is available to all OMEGAMON for Db2 PE sessions as long as the Near-Term History Data Collector is running. If the collector is stopped and restarted, the near-term history data buckets will be empty and ready to begin saving data again.

Besides near-term history information, select this menu path for information about the Near-Term History Data Collector. One panel shows the current collection options (for example, collection interval and data storage selections). The other panel provides information about the data that has been collected since the Near-Term History Data Collector was started.