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# Cluster --> Monitoring

Tasks Related Topics Attributes

## Overview

The Cluster—>Monitoring page displays how many Managed Servers are configured for the current cluster, and how many of the configured Managed Servers are currently running. For each Managed Server configured for the cluster, the monitoring table displays the current state of the server instance, and metrics about activity since the server instance was started.

## Tasks

Assigning Servers to a Cluster

Monitoring a Cluster

## Related Topics

- Using WebLogic Server Clusters
- Monitoring a WebLogic Server Domain in Configuring and Managing WebLogic Server
- Understanding Server State in Configuring and Managing WebLogic Server

## Attributes

Table 40-1

Attribute Label | Description | Value Constraints
--- | --- | ---
Number of Servers configured for this cluster | The number of servers configured for this Cluster, including inactive servers. MBean: `weblogic.management. configuration.ClusterMBean` Attribute: `ConfiguredServerCount` |
Number of Servers currently participating in this cluster | The number of servers currently active in this Cluster. MBean: `weblogic.management. configuration.ClusterMBean` Attribute: `ActualServerCount` |
Name | Name of the Managed Server. |
State | Current state of the Managed Server MBean: `weblogic.management. runtime.ServerRuntimeMBean` Attribute: `Health`State |
Servers | Number of active Managed Servers in the cluster. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `AliveServersCount` |
Resend Requests | The number of state change messages that the current Managed Server resent because a receiving Managed Server missed a message. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `ResendRequestsCount` |
Fragments Received | Total number of multicast message fragments received by the current Managed Server from other Managed Servers in the cluster. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `FragmentsReceivedCount` |
Lost Multicast Messages | Total number of incoming multicast messages lost by the current Managed Server. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `MulticastMessagesLostCount` |
Secondary Distributions | The names of the remote Managed Servers for which the current Manager Server is hosting session replicas. The name is appended with a number to indicate the number of secondaries hosted for that Managed Server. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `SecondaryDistribution Names` |
Primaries | The number of object that the local server hosts. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `PrimaryCount` |
Machine | Machine upon which the Managed Server runs. |
Known Servers | The names of the active Managed Servers in the cluster. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: ServerNames |
Foreign Fragments Dropped | The number of dropped multicast message fragments that originated in foreign domains/cluster that use the same multicast address. MBean:`weblogic.management. ClusterRuntimeMBean` Attribute: `ForeignFragmentsDroppedCount` |