The appropriate configuration of the cluster interconnects ensures that there is sufficient bandwidth and low latency. The former and the latter are the major prerequisites for optimal Cache Fusion performance. Let's look at the factors determining the Cache Fusion performance from the cluster interconnect perspective. It is important to understand the concepts and configuration of the private interconnect for high performance. We are looking at achieving a high bandwidth and low latency interconnect infrastructure for the private interconnect to ensure timely delivery of clusterware messages and block image copies.
A tool that can be used to monitor the whole cluster, including the interconnect, is Oracle Cluster Health Monitor (IPD/OS). The information about this is available at http://www.oracle.com/technology/products/database/clustering/ipd_download_homepage.html.