The CLUSTER Health Monitor (CHM) stores operating system metrics in the CHM repository for all NODES in a RAC cluster. It stores information on CPU, MEMORY, process, network and other OS DATA, This information can later be retrieved and used to troubleshoot and identify any cluster related issues. It is a DEFAULT component of the 11gr2 grid install. The data is stored in the master repository and replicated to a standby repository on a different node.

The Cluster Health Monitor (CHM) stores operating system metrics in the CHM repository for all nodes in a RAC cluster. It stores information on CPU, memory, process, network and other OS data, This information can later be retrieved and used to troubleshoot and identify any cluster related issues. It is a default component of the 11gr2 grid install. The data is stored in the master repository and replicated to a standby repository on a different node.