Monitoring RAC cluster interconnect performance

In order to allow Cache Fusion to work its magic in the best way possible, you should take the RAC cluster interconnect design into serious consideration for optimum performance. For cluster interconnect performance to function at optimum levels, you need to ensure low latency and high throughput of the public and private interfaces for the interconnect. These connections affect the overall performance of Cache Fusion with RAC.

By tuning the private interconnect to ensure high bandwidth and low latency between cluster nodes, you can ensure timely delivery of clusterware messages and block image copies.

Oracle provides a useful tool to monitor the entire RAC cluster. The tool is called the Oracle Cluster Health Monitor (IPD/OS). Information about this tool is available at the following URL: http://www.oracle.com/technology/products/database/clustering/ipd_download_homepage.html.

This is now called Cluster Health Monitor or CHMOS.