If a node is not responding to the Performance Manager GUI, its icon has a riderless horse:

Either the network link to that node is broken, the node has crashed, or the node doesn't exist in the network.

The installation script starts all Performance Manager daemons automatically after a successful installation and configuration, and these daemons are started automatically at boot time. Use the information in the following links only if you need to restart a Performance Manager daemon:

pmgrd

This daemon must run on each node managed by Performance Manager. Without pmgrd, the Performance Manager GUI cannot gather its data from that node.

clstrmond

This daemon must run on each cluster where Performance Manager runs commands. Without clstrmond, a command cannot run on a cluster, and it cannot display its output to the Performance Manager GUI.