Monitor snapshot and archive statistics

Use the Snapshot and Archive Statistics tool to monitor snapshot and archive activity and usage statistics on connected Data Archive servers. If you periodically review these statistics, you can solve a system or data issue before it becomes a problem. Many of the statistics, such as Overflow Data Record Count, are informational; others are valuable for predictive maintenance.

The archive statistics displayed are aggregated statistics, not separated by historical and future archive set types. For example, if you are viewing the archiving flag in Operation > Snapshot and Archive Statistics, the archiving flag records the state of both archive sets, historic and future, combined. The values returned range from 0 (zero) to 3, as shown in this table. (The archiving flag indicates that events will be read off the event queue and archived.)

All data passes through both the snapshot and the archive subsystems. Indicators available in the Snapshot and Archive Statistics tool can alert you to potential data-flow problems. For example:

• Out-of-order events are events that arrive with an older timestamp than the current value. Out-of-order events may indicate that there is a clock problem on the Interface node.

• Rising event numbers on the Snapshot Overflow Queue indicates that the archive is not accepting new data or cannot keep up with the pace of the data transfer. This situation could have a number of causes and should be remedied immediately.

To open the Snapshot and Archive Statistics tool, select Operation > Snapshot and Archive Statistics under System Management Tools.