Reference:https://docs.cloud.oracle.com/en-us/iaas/Content/Network/Tasks/remoteVCNpeering.htm(note)

Explanation
to Increase disk performance by using NVMe disks you can use Dense IO Shape also as the number of CPUs will not change so we should VM.DenseIO2.16

Explanation
https://docs.cloud.oracle.com/iaas/Content/Balance/Tasks/managingcertificates.htm

Explanation
A policy is a document that specifies who can access which Oracle Cloud Infrastructure resources that your company has, and how. A policy simply allows a group to work in certainways with specific types of resources in a particular compartment In general, here's the process an IAM administrator in your organization needs to follow:
Define users, groups, and one or more compartments to hold the cloud resources for your organization.
Create one or more policies, each written in the policy language.
Place users into the appropriate groups depending on the compartments and resources they need to work with.
Provide the users with the one-time passwords that they need in order to accessthe Console and work with the compartments. For more information,

Explanation
In ATP Service Console,
In the activity screen allows you to perform some basic monitor database activity and SQL queries

In the administration screen allows you toperform some basic administration of the service, like reset the admin password and set resource management rules