Overview of DB System

A MySQL HeatWave DB system is composed of one or more MySQL instances.

A standalone DB system is composed of one MySQL instance and a high availability DB system is composed of three MySQL instances. Each read replica that is added to the DB system adds an additional MySQL instance to the DB system.

A MySQL instance consists of:
  • A compute instance installed with Oracle Linux operating system and MySQL Enterprise Edition. The available resources are defined by the shape of the computer instance. See Supported Shapes.
  • Virtual network interface card (VNIC) that attaches the MySQL instance to a subnet of the Virtual Cloud Network (VCN).
  • Network-attached block storage to store the database data and log files. MySQL HeatWave Service uses the Higher Performance option for all block storage. See Block Volume.

You cannot access the operating system. Only the MySQL instance is exposed through the endpoint of the DB system.