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- What's New
- Function Overview
- Service Overview
- Getting Started
-
User Guide
- Usage Rules
- Billing Management
- Data Migration
- Instance Lifecycle Management
- Instance Modifications
- Read Replicas
- Database Management
- Account Management (Non-Administrator)
- Data Security
- Data Backups
- Data Restorations
- Connection Management
-
Parameter Template Management
- Creating a Parameter Template
- Modifying a Parameter Template
- Exporting Parameters
- Comparing Parameter Templates
- Viewing Parameter Change History
- Replicating a Parameter Template
- Resetting a Parameter Template
- Applying a Parameter Template
- Viewing Application Records of a Parameter Template
- Editing a Parameter Template Description
- Deleting a Parameter Template
- Metrics and Alarms
- Interconnection with CTS
- Log Management
- Task Center
- Managing Tags
- Managing Quotas
- Change History
- Best Practices
- Performance White Paper
- Security White Paper
- SDK Reference
-
API Reference
- Before You Start
- API Overview
- Calling APIs
-
APIs (Recommended)
- DB Engine Version Queries
- Database Specification Queries
-
Instance Management
- Creating a DB Instance
- Querying DB Instances
- Rebooting a DB Instance
- Deleting a DB Instance
- Querying Details of a DB Instance
- Querying Details of DB Instances in Batches
- Creating a Read Replica
- Deleting a Read Replica
- Scaling up Storage of a Yearly/Monthly DB Instance
- Changing a DB Instance Name
- Resetting a Database Password
- Changing DB Instance Specifications
- Querying Dedicated Resource Pools
- Querying Dedicated Resources
- Configuring the Monitoring By Seconds Function
- Querying the Configuration of Monitoring by Seconds
- Enabling or Disabling SSL
- Binding an EIP
- Unbinding an EIP
- Promoting a Read Replica to Primary
- Changing a Maintenance Window
- Modifying a Security Group
- Changing a Private IP Address
- Changing a Database Port
- Changing a DB Instance Description
- Backup Management
- Parameter Template Management
- Quota Management
- Log Management
- Tag Management
- Database User Management
- Database Management
- SQL Statement Concurrency Control
- Task Center
- APIs (Unavailable Soon)
- Permissions Policies and Supported Actions
- Appendix
- Change History
-
FAQs
- Product Consulting
-
Database Connections
- Can an External Server Access the GaussDB(for MySQL) Database?
- What Do I Do If the Number of GaussDB(for MySQL) Database Connections Reaches the Upper Limit?
- What Is the Maximum Number of Connections to a GaussDB(for MySQL) Instance?
- What Should I Do If an ECS Cannot Connect to a GaussDB(for MySQL) Instance?
- How Can I Connect to a MySQL Database Through JDBC?
- How Can I Create and Connect to an ECS?
- What Should I Do If a Database Client Problem Causes a Connection Failure?
- Why Cannot I Ping My EIP After It Is Bound to a DB Instance?
- What Can I Do If the Connection Test Failed?
- Can I Access a GaussDB(for MySQL) Instance over an Intranet Connection Across Regions?
- Are There Any Potential Risks If There Are Too Many Connections to a GaussDB(for MySQL) Instance?
- What Should I Do If an ECS and a GaussDB(for MySQL) instance Deployed in Different VPCs Cannot Communicate with Each Other?
- How Do I View All IP Addresses Connected to a Database?
- Client Installation
- Database Migration
- Database Permissions
-
Database Performance
- What Should I Do If the CPU Usage of My Instance Is High?
- How Do I Handle Slow SQL Statements Caused by Inappropriate Composite Index Settings?
- How Do I Handle a Large Number of Temporary Tables Being Generated for Long Transactions and High Memory Usage?
- What Should I Do If Locks on Long Transactions Block the Execution of Subsequent Transactions?
- Database Usage
- Backups
-
Database Parameter Modification
- How Can I Change the Time Zone?
- How Do I Configure a Password Expiration Policy for GaussDB(for MySQL) Instances?
- How Do I Ensure that the Database Character Set of a GaussDB(for MySQL) Instance Is Correct?
- How Do I Use the utf8mb4 Character Set to Store Emojis in a GaussDB(for MySQL) Instance?
- How Do I Set Case Sensitivity for GaussDB(for MySQL) Table Names?
- Can I Use SQL Commands to Modify Global Parameters?
-
Network Security
- What Security Assurance Measures Does GaussDB(for MySQL) Have?
- How Can I Prevent Untrusted Source IP Addresses from Accessing GaussDB(for MySQL)?
- How Do I Configure a Security Group to Enable Access to a GaussDB(for MySQL) Instance?
- How Can I Import the Root Certificate to a Windows or Linux Server?
- How Do I Manage and Ensure GaussDB(for MySQL) Security?
- Log Management
- Version Upgrade
- Change History
-
Troubleshooting
-
Backup and Restoration Issues
- Insufficient Permissions During Data Export Using mysqldump
- How Do I use mysqlbinlog to Obtain Binlog Files?
- Canal Fails to Parse Binlogs
- Precautions for Exporting Large Tables Through mysqldump
- Commands for Exporting Data Through mysqldump
- System Inaccessible After Field Addition to a Database Table
- SQL Statements Such as SET @@SESSION.SQL_LOG_BIN Displayed After You Run mysqldump
- Insufficient Permissions Reported for Canal
-
Connection Issues
- Login Failed After ssl_type of root Is Changed to ANY
- Failed to Connect to a DB Instance Using SSL
- Description of Each IP Address
- SSL Connection Failed Due to Inconsistent TLS Versions
- Error Message "connection established slowly"
- "Access denied" Displayed During Database Connection
- Failed to Connect to a Database Using mariadb-connector in SSL Mode
- Failed to Connect to a Database as User root
- Client Automatically Disconnected from a DB Instance
- Disconnection Occurs Every 45 Days Due to the istio-citadel Certificate Mechanism
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SQL Issues
- Invalid TIMESTAMP Default Value during Table Creation
- Failed to Change the VARCHAR Length Due to the Index Length Limit
- Slow SQL Queries After a Large Amount of Data Is Deleted from a Large Table
- Error 1366 Reported When Data Containing Emojis Is Updated
- Slow Stored Procedure Execution Due to Inconsistent Collations
- ERROR [1412] Reported for a DB Instance
- Failed to Delete a Table with a Foreign Key
- Incorrect GROUP_CONCAT Results
- Error Message "Too many keys specified" Displayed When a Secondary Index Is Created
- DISTINCT and GROUP BY Optimization
- Equivalent Comparison Failures with Floating-Point Numbers
- Tablespace Bloat
- ERROR 1396 Reported When a User Is Created
- Error Message Reported When alter table xxx discard/import tablespace Is Executed
- Native Error 1461 Reported by a DB Instance
- "Row size too large" Reported When a Table Failed to Be Created
- Parameter-related Issues
- Performance Issues
-
Basic Issues
- How Do I View Used Storage of My GaussDB(for MySQL) Instance?
- Renaming Databases and Tables
- Character Set and Collation Settings
- Auto-Increment Field Value Jump
- Starting Value and Increment of AUTO_INCREMENT
- Changing the AUTO_INCREMENT Value of a Table
- Failed to Insert Data Because Values for the Auto-increment Primary Key Field Reach the Upper Limit
- Auto-increment Field Values
- AUTO_INCREMENT Not Displayed in the Table Structure
- Impact of Creating an Empty Username
- No Scanned Rows Recorded in Slow Query Logs
- Change History
-
Backup and Restoration Issues
- Videos
Security White Paper
GaussDB(for MySQL) is a secure and reliable database service.
GaussDB(for MySQL) complies with security regulations, adheres to service boundaries, and will never monetize customer data. It allows you to quickly provision different types of databases and supports auto scaling of compute and storage resources as required. With GaussDB(for MySQL), you can create automated or manual backups and perform point-in-time restores (PITRs) to prevent data loss. It also provides parameter templates for database tuning.
GaussDB(for MySQL) provides comprehensive measures to ensure the reliability and security of your databases, including VPCs, security groups, permissions settings, SSL encryption, automated backups, manual backups, PITRs, and cross-AZ deployment.
Network Isolation
You can configure VPC inbound rules to allow specific IP address segments to connect to databases. GaussDB(for MySQL) instances run in an independent VPC. You can create a cross-AZ subnet group and deploy primary/standby instances in it. After an instance is created, GaussDB(for MySQL) will assign a subnet IP address to the instance for connection. After GaussDB(for MySQL) instances are deployed in a VPC, you can use a VPN to access the instances from other VPCs. You can also create an ECS in the VPC housing the GaussDB(for MySQL) instances and connect the ECS and instances through a private IP address. Subnets and security groups can be used together to isolate GaussDB(for MySQL) instances and enhance security.
Access Control
When you are creating a GaussDB(for MySQL) instance, an account is automatically created. After you specify a password for this account, you can use it to connect and operate your created instances. For security reasons, you are advised to create IAM users and grant permissions for them. You can create your instances in a security group and deploy your service NIC in the same security group. Then, configure inbound and outbound rules to control access to your instances. You do not need to reboot instances after you configure security group rules. The security group only allows access over the database listening port.
Transmission Encryption
The connections between database clients and servers can be encrypted with transport layer security (TLS). A specified certificate agency (CA) generates a unique service certificate for each GaussDB(for MySQL) instance upon provisioning. Database clients can download a root certificate from the management console and provide this certificate when connecting to the database to authenticate the database server and encrypt data during transmissions.
Automated and Manual Backups
GaussDB(for MySQL) supports automated and manual backups. The automated backup function is enabled by default. Automated backups can be retained for a maximum of 732 days. You can use them to restore data to a specific point in time. GaussDB(for MySQL) automatically backs up full data and incrementally backs up transaction logs every five minutes, so you can restore data to any point in time ahead of the last incremental backup. Manual backups are user-initiated full backups of DB instances. They are stored in OBS buckets. When you delete a DB instance, the manual backups will be retained unless you manually delete them. You can restore data to new instances from existing backups.
Data Replication
You can deploy primary/standby instances within an AZ or across AZs for high availability. If you create primary/standby instances, GaussDB(for MySQL) automatically sets up synchronous replication between your primary node and read replicas. If the primary node fails, a read replica takes over services quickly to ensure high availability.
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