Before you begin
When you target a diagnostic system module to a server instance, you apply the configuration defined in the diagnostic system module to the server instance (and thereby monitor the server instance, as defined in the diagnostic system module configuration). You can target a diagnostic module to individual stand-alone server instances, individual server instances in a cluster, or all server instances in a cluster. You can target the same module to one or more server instances or clusters, but you can target only one module at a time to a single server instance or cluster.
If you delete a diagnostic system module, you will lose all the configuration defined in that module. However, you can untarget a module so that the configuration is saved but is not currently being used. To apply the configuration defined in the module again, target it to one or more server instances, as before.