You can use tools in the Autonomous Health Framework to analyze your cluster configuration.

• Analyzing Risks and Complying with Best Practices
  Use configuration audit tools Oracle ORAchk and Oracle EXAchk to assess your Oracle Engineered Systems and non-Engineered Systems for known configuration problems and best practices.
• Proactively Detecting and Diagnosing Performance Issues for Oracle RAC
  Oracle Cluster Health Advisor provides system and database administrators with early warning of pending performance issues, and root causes and corrective actions for Oracle RAC databases and cluster nodes.