You tune the performance of Oracle Database on Oracle Database Exadata Cloud at Customer using the same tools you would use for an Oracle database running on any system in your data center. Exadata Cloud at Customer does not place any special restrictions on performance tuning.
The Oracle Database Performance Tuning Guide for Release 18, 12.2, 12.1 or 11.2 provides extensive information about how to use Oracle Database performance tools to optimize database performance. It also describes performance best practices and includes performance-related reference information.
Additionally, the Enterprise Manager Tuning and Performance option packs are included in all Exadata Cloud at Customer database deployments. These option packs provide several utilities to assist in maintaining performance and identifying and correcting performance issues.
If your performance tuning activities indicate that you need more computing power or more storage, you can scale Exadata Cloud at Customer to satisfy the need. See Scaling an Exadata Cloud at Customer Instance.