63 Mail List Server Redundancy Group

The Mail List Server Redundancy Group target is a logical grouping of List Server agent monitored targets that have identical configuration, characteristics, and functionality. While a single List Server instance is vulnerable to the failure of its host or system, a redundant group of List Servers continues to function despite the loss of a List Server instance, hiding any such failure from clients, and allowing other List Server instances in the group to service the requests.

63.1 Queue Messages

The Queued Messages category provides information about queued messages.

63.1.1 Queued Messages Pending Pruning

This metric indicates the number of queued messages that are yet to be pruned. The value is the sum of all the queued messages that are not pruned for the List Server agent monitored targets.

Metric Summary

The following table shows how often the metric's value is collected.

Target Version	Evaluation and Collection Frequency
Version 1.0	Every 15 minutes

63.1.2 Queued Messages Pruned

This metric indicates the number of queued messages that have been pruned. The value is the sum of all the queued messages pruned for the List Server agent monitored targets.

Metric Summary

The following table shows how often the metric's value is collected.

Target Version	Evaluation and Collection Frequency
Version 1.0	Every 15 minutes

63.2 Response

The Mail List Response category checks and displays whether or not the List Service agent monitored targets are running.

63.2.1 Status

This metric indicates whether or not the List Server agent monitored target is available. The status is "up" as long as at least one of the List Server agent monitored targets is available.

User Action

If the Status of Mail List Server Redundancy Group is down, then check the status of the individual List Server agent monitored targets to identify which particular one is down.