Explanation
References:https://docs.cloud.oracle.com/iaas/Content/DNS/Reference/supporteddnsresource.htm?tocpath=Servi

Explanation
The second tool, OCI IP Troubleshooting, helps troubleshoot issues with public facing IP addresses.
This feature is also part of our Internet Intelligence toolset, providing analytical insight to help network operations teams reduce the time it takes to troubleshoot an issue by providing awareness of availability and latency across the Internet.
Ref: https://blogs.oracle.
com/cloud-infrastructure/internet-intelligence,-now-available-in-the-oracle-cloud-infrastructure-console

Explanation
You can scale up/down your Autonomous Database to scale both in terms of compute (CPU) and storage only whenneeded, allows people to pay per use.
Oracle allows you to scale compute and storage independently, no need to do it together. these scaling activities fully online (no downtime required) in Details page Autonomous Database in OCI console, click Scale Up/Down. Click on arrow to select a value for CPU Core Count or Storage (TB).
Or Select auto scaling to allow the system to automatically use up to three times more CPU and IO resources to meet workload demand, compared to the database operating with auto scaling disabled.

Explanation
You can permanently terminate (delete) instances that you no longerneed. Any attached VNICs and volumes are automatically detached when the instance terminates. Eventually, the instance's public and private IP addresses are released and become available for other instances. By default, the instance's boot volume is deleted when you terminate the instance, however you can preserve the boot volume associated with the instance, so that you can attach it to a different instance as a data volume, or use it to launch a new instance.
Dense I/O Shapes Designed for largedatabases, big data workloads, and applications that require high-performance local storage. DenseIO shapes include locally-attached NVMe-based SSDs.
so once you create the VM.DenseIO you need to moce the Database to locally-attached NVMe-based SSDs