All Products
Search
Document Center

Database Autonomy Service:21

Last Updated:Jun 16, 2026

Release notes for Database Autonomy Service (DAS) in 2021, with links to related topics.

December 2021

Database engine

Feature

Description

Release date

References

PolarDB-X 2.0

Traffic playback and stress testing

Traffic playback and stress testing is available in the China (Hangzhou), China (Shanghai), China (Beijing), and China (Shenzhen) regions.

2021-12-15

Create a traffic playback and stress testing task

November 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for MySQL and PolarDB for MySQL

SQL throttling

An API operation is added for SQL throttling. You can generate throttling keyword strings from SQL statements.

2021-11-16

GetSqlConcurrencyControlKeywordsFromSqlText

ApsaraDB RDS for MySQL, ApsaraDB RDS for MySQL, ApsaraDB RDS for PostgreSQL, ApsaraDB RDS for SQL Server, ApsaraDB for MongoDB, and PolarDB for PostgreSQL (Compatible with Oracle)

SQL diagnostics

API operations are added for SQL diagnostics.

2021-11-12

October 2021

Database engine

Feature

Description

Release date

References

PolarDB-X 2.0

Traffic playback and stress testing

Traffic playback and stress testing is available in the Singapore region.

2021-10-14

Create a traffic playback and stress testing task

September 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for MySQL and PolarDB for MySQL

Traffic playback and stress testing

Stress testing reports now include SQL query performance data for both source and destination database instances, allowing you to compare SQL performance across instances.

2021-09-29

Create a traffic playback and stress testing task

PolarDB for MySQL

Traffic playback and stress testing

Advanced settings are available for destination database instances. You can specify node endpoints to test specific nodes in an instance.

2021-09-29

Create a traffic playback and stress testing task

ApsaraDB RDS for MySQL, self-managed MySQL, and PolarDB for MySQL

Inspection and scoring

Database instance health can be inspected and scored on a regular basis.

2021-09-25

Inspection and scoring

ApsaraDB RDS for MySQL

New region

Automatic scaling up and scaling down is supported for ApsaraDB RDS instances that use local SSDs in the China (Beijing) region.

2021-09-13

Automatic performance scaling

PolarDB-X 2.0

SQL throttling

SQL throttling controls the number of database access requests and concurrent SQL requests, helping ensure database service availability.

2021-09-10

SQL throttling

ApsaraDB RDS for MySQL and PolarDB for MySQL

Query governance

Query governance classifies and manages slow queries based on severity levels.

2021-09-10

Query governance

ApsaraDB RDS for MySQL and PolarDB for MySQL

DAS Professional Edition downgrade

You can downgrade DAS Professional Edition.

2021-09-09

Manage DAS enterprise edition and O&M services

ApsaraDB for Redis

Automatic bandwidth adjustment

ApsaraDB for Redis instance bandwidth is automatically adjusted to handle expected and unexpected traffic spikes.

2021-09-09

Automatic bandwidth adjustment

August 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for MySQL and PolarDB for MySQL

Query governance

Query governance classifies and manages slow queries based on severity levels.

2021-08-24

Query governance

ApsaraDB RDS for MySQL

Traffic playback and stress testing

Stress testing helps you determine whether your database instance needs to be scaled up to handle traffic spikes.

2021-08-06

Intelligent stress testing (for CloudTmall users)

July 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for PostgreSQL

SQL Explorer

SQL statement health can be diagnosed to help you troubleshoot performance issues.

2021-07-16

SQL Explorer

June 2021

Database engine

Feature

Description

Release date

References

ApsaraDB for Redis

Key analysis

Identifies hot keys and big keys in database instances.

2021-06-12

Top key analysis

April 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for MySQL and PolarDB for MySQL

Identification of duplicate indexes

Identifies duplicate indexes in ApsaraDB RDS for MySQL instances and PolarDB for MySQL clusters.

2021-04-15

Storage analysis

ApsaraDB RDS for MySQL and PolarDB for MySQL

Identification of potential overflows of auto-increment primary keys

Identifies potential overflows of auto-increment primary keys in ApsaraDB RDS for MySQL instances and PolarDB for MySQL clusters.

2021-04-15

Storage analysis

February 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for MySQL and ApsaraDB RDS for PostgreSQL

Storage analysis

View storage usage, remaining storage days, per-table storage details, tablespace fragments, and storage anomaly diagnostic reports for a database instance.

2021-02-27

Storage analysis

ApsaraDB RDS for MySQL

Automatic recycling of tablespace fragments

Automatically identifies and recycles tablespace fragments during O&M windows, improving database performance and reducing storage costs.

2021-02-01

Automatic fragment reclamation

January 2021

Database engine

Feature

Description

Release date

References

ApsaraDB RDS for MySQL

Automatic storage expansion

Automatically expands storage for ApsaraDB RDS for MySQL High-availability Edition instances to handle traffic spikes.

2021-01-27

Automatic space expansion

ApsaraDB RDS for MySQL

Traffic playback and stress testing

Stress testing helps you determine whether your database instance needs to be scaled up to handle traffic spikes.

2021-01-01

Create a traffic playback and stress testing task

ApsaraDB RDS for MySQL

Automatic parameter tuning

Automatically tunes database parameters using machine learning algorithms to determine optimal values based on instance workloads and specifications.

2021-01-01

Automatic parameter tuning