This page defines key terms used in Database Autonomy Service (DAS) documentation. Terms are grouped by category to help you locate relevant concepts faster.
General concepts
These terms describe standard database infrastructure concepts that DAS monitors and manages.
database instance An independent database environment running in the cloud. A database instance contains multiple user-created databases and is accessible by client tools and applications.
on-premises database instance A database instance deployed in a non-cloud environment, such as a data center.
ECS-based self-managed database A self-managed database deployed on an Alibaba Cloud Elastic Compute Service (ECS) instance.
cluster A collection of one or more database instances running the same database engine, such as MySQL, Oracle, or SQL Server.
index A data structure that the database management system uses to sort data in one or more columns of a table, enabling fast access to specific rows.
DAS-specific concepts
These terms are specific to DAS and describe its components and features.
DBGateway A daemon process deployed in your environment. DBGateway collects and computes database performance data without reading your business data. DBGateway encrypts and compresses data before transmission. For more information, see DBGateway.
immediate remediation suggestions Emergency measures that DAS surfaces during system anomalies or performance failures to help restore core business operations quickly. These are temporary optimizations or resource adjustments that provide a buffer for permanent remediation solutions while minimizing impact on user experience and business.