- What's New
- Function Overview
- Product Bulletin
- Service Overview
- Billing
- Getting Started
-
Kernel
- TaurusDB Kernel Version Release History
-
Common Kernel Functions
- Parallel Query
- Near Data Processing
- DDL Optimization
- Fast Binlog Positioning
- Backward Index Scan
- Statement Outline
- Idle Transaction Disconnection
- LIMIT...OFFSET Pushdown
- Conversion of IN Predicates Into Subqueries
- DISTINCT Optimization for Multi-Table Joins
- Diagnosis on Large Transactions
- Enhanced Partitioned Tables
- Hot Row Update
- Multi-tenancy
- Column Compression
- Table Recycle Bin
- Cold Data Preloading for Read Replicas
- Self-Healing of Read Replicas upon a Replication Latency
-
User Guide
- Permissions Management
- Buying a DB Instance
- Connecting to a DB Instance
- Database Usage
- Data Migration
-
Instance Management
- Viewing the Overall Status of DB Instances
- Viewing Metrics
- Instance Lifecycle Management
-
Configuration Changes
- Changing the vCPUs and Memory of a DB Instance or Node
- Changing the Storage Space of a DB Instance
- Configuring Auto Scaling Policies for a DB Instance
- Changing the Maintenance Window of a DB Instance
- Customizing Displayed Items of the Instance List
- Upgrading the Minor Kernel Version of a DB Instance
- Updating the OS of a DB Instance
- Data Backups
- Data Restorations
- Serverless Instances
- Multi-primary Instances (OBT)
- Read Replicas
-
Database Proxy (Read/Write Splitting)
- What Is Database Proxy?
- Creating a Proxy Instance for Read/Write Splitting
-
Changing Configurations of a Proxy Instance
- Changing the Consistency Level of a Proxy Instance
- Enabling the Connection Pool for a Proxy Instance
- Enabling Transaction Splitting for a Proxy Instance
- Modifying the Routing Policy of a Proxy Instance
- Changing Read Weights of Nodes
- Changing the Multi-statement Processing Mode of a Proxy Instance
- Enabling Automatic Association of New Nodes with a Proxy Instance
- Enabling Access Control for a Proxy Instance
- Changing the Specifications of a Proxy Instance
- Changing the Number of Nodes for a Proxy Instance
- Applying for a Private Domain Name for a Proxy Instance
- Changing the Port of a Proxy Instance
- Changing the Proxy Address of a Proxy Instance
- Modifying Parameters of a Proxy Instance
- Binding an EIP to a Proxy Instance
- Proxy Instance Lifecycle
- Proxy Instance Kernel Versions
- Using Hints for Read/Write Splitting
- DBA Assistant
- Parameter Management
- Security and Encryption
- Cold and Hot Data Separation (OBT)
- Application Lossless and Transparent (ALT)
-
HTAP Analysis (Standard Edition)
- What Is HTAP of Standard Edition?
- Connecting to an HTAP Instance for Complex OLAP Queries
- Connecting to a Standard HTAP Instance
-
Standard HTAP Instance Management
- Rebooting a Standard HTAP Instance
- Rebooting a Node of a Standard HTAP Instance
- Changing Storage Space of a Standard HTAP Instance
- Adding Read Replicas to a Standard HTAP Instance
- Deleting a Standard HTAP Instance
- Adjusting Blacklisted or Whitelisted Tables of a Standard HTAP Instance and Repairing Tables
- Standard HTAP Account Management
- Viewing Metrics of a Standard HTAP Instance or Nodes
- Syntax and Data Type Mappings Between HTAP and TaurusDB Instances
- Performance Tuning
-
RegionlessDB Clusters (OBT)
- What Is a RegionlessDB Cluster?
- Using a RegionlessDB Cluster for Remote Multi-Active DR
- Using a RegionlessDB Cluster for Remote DR
- Performing a Primary/Standby Switchover or Failover in a RegionlessDB Cluster
- Removing a Standby Instance from a RegionlessDB Cluster
- Deleting a RegionlessDB Cluster
- Viewing the Replication Latency and Traffic of a RegionlessDB Cluster
- Monitoring and Alarms
- Logs and Auditing
- Task Center
- Tag Management
- Quota Management
- Best Practices
- Performance White Paper
-
API Reference
- Before You Start
- API Overview
- Calling APIs
-
APIs (Recommended)
- DB Engine Version Queries
- Database Specification Queries
-
Instance Management
- Creating a DB Instance
- Rebooting a DB Instance
- Deleting/Unsubscribing from a DB Instance
- Creating a Read Replica
- Deleting or Unsubscribing from 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
- Rebooting a Node
- Upgrading the Kernel Version of a DB Instance
- Enabling or Disabling SSL
- Binding an EIP
- Unbinding an EIP
- Promoting a Read Replica to Primary
- Changing a Maintenance Window
- Changing a Security Group
- Changing a Private IP Address
- Changing a Database Port
- Changing a DB Instance Description
- Applying for a Private Domain Name
- Changing a Private Domain Name
- Querying the Kernel Version
- Modifying Auto Scaling Policies
- Querying Auto Scaling Policies
- Pre-Checking Resources
- Querying DB instances
- Querying Details of a DB Instance
- Querying Details of DB Instances in Batches
- Modifying a Recycling Policy
- Querying a Recycling Policy
- Querying Instances in the Recycle Bin
- Changing Node Names in Batches
- Querying Historical Records of Auto Scaling
- Setting a Policy for a Serverless DB Instance
- Changing the Failover Priority of a Read Replica
- Querying an EIP
-
Backup Management
- Configuring a Same-Region Backup Policy
- Creating a Manual Backup
- Querying Full Backups
- Querying an Automated Backup Policy
- Deleting a Manual Backup
- Restoring Data to the Original Instance or an Existing Instance
- Querying the Restoration Time Range
- Enabling or Disabling Encrypted Backup
- Checking Whether Encrypted Backup Is Enabled
- Querying Incremental Backups
- Configuring a Cross-Region Backup Policy
- Restoring Tables to a Specified Point in Time
- Querying Tables for Table-level Point-in-Time Recovery
-
Parameter Template Management
- Querying Parameter Templates
- Creating a Parameter Template
- Deleting a Parameter Template
- Obtaining Details About a Parameter Template
- Modifying Parameters in a Parameter Template
- Applying a Parameter Template
- Replicating a Parameter Template
- Comparing Parameter Templates
- Querying Instances That a Parameter Template Can Be Applied To
- Viewing Parameter Change History
- Obtaining Parameter Information of a Specified DB Instance
- Modifying Parameters of a Specified DB Instance
- Replicating the Parameter Template of a DB Instance
- Querying Application Records of a Parameter Template
- Quota Management
-
Database Proxy
- Creating a Proxy Instance
- Deleting a Proxy Instance
- Querying Proxy Instances
- Querying Proxy Instance Specifications
- Adding Proxy Nodes
- Deleting Proxy Nodes
- Changing the Specifications of a Proxy Instance
- Assigning Read Weights
- Changing the Routing Policy of a Proxy Instance
- Enabling or Disabling Transaction Splitting for a Proxy Instance
- Enabling or Disabling Automatic Association of New Nodes with Proxy Instances
- Changing Session Consistency of a Proxy Instance
- Changing the Connection Pool Type of a Proxy Instance
- Changing the Port of a Proxy Instance
- Upgrading the Kernel Version of a Proxy Instance
- Modifying the Name of a Proxy Instance
- Querying Access Control Settings of a Proxy Instance
- Querying the Minor Version of a Proxy Instance
- Modifying Parameters of a Proxy Instance
- Querying Kernel Parameters of a Proxy Instance
- Enabling or Disabling Access Control
- Configuring Access Control Rules
- Enabling or Disabling SSL for a Proxy Instance
- Rebooting a Proxy Instance
-
Log Management
- Enabling or Disabling SQL Explorer
- Querying Whether SQL Explorer Is Enabled
- Querying Slow Query Logs
- Querying Error Logs
- Obtaining the Temporary Link for Downloading Full SQL
- Querying LTS Configurations of an Instance
- Deleting LTS Configurations in Batches
- Creating LTS Configurations in Batches
- Querying Whether Show Original Log Is Enabled
- Enabling or Disabling Show Original Log
- Querying Slow Query Log Statistics
- Obtaining Links for Downloading Slow Query Logs
- Tag Management
- Database User Management
- Database Management
- Traffic Management
- Task Center
- Intelligent Diagnosis
-
HTAP (Standard Edition)
- Restoring a Data Synchronization Task for a StarRocks Instance
- Stopping a Data Synchronization Task for a StarRocks Instance
- Checking Table Configurations for HTAP Data Synchronization
- Creating a StarRocks Instance
- Querying a StarRocks Instance
- Deleting a StarRocks Instance
- Rebooting a StarRocks Instance
- Rebooting a StarRocks Node
- Checking StarRocks Resources
- Querying HTAP Engine Resources
- Obtaining the Storage Type of an HTAP Instance
- Querying Specifications of an HTAP Instance
- Querying HTAP Instances
- Creating a Data Synchronization Task for a StarRocks Instance
- Deleting a Data Synchronization Task for a StarRocks Instance
- Querying Data Synchronization Tasks of a StarRocks Instance
- Checking Database Configurations for HTAP Data Synchronization
- Querying Configurations of a StarRocks Data Synchronization Task
- Querying Database Parameter Settings for StarRocks Data Synchronization
- Querying Databases of a StarRocks Instance
- Querying Database Accounts
- Creating a Database Account
- Deleting a Database Account
- Changing the Password of a Database Account
- Changing Permissions of a Database Account
- Changing the Specifications of a StarRocks Instance
- Querying Parameters
- Modifying Parameters
- Enabling Assign Requests to Row and Column Store Nodes for a StarRocks Instance
- Comparing Parameters
- Multi-tenancy
-
APIs (Unavailable Soon)
- DB Engine Version Queries
- Database Specification Queries
-
Instance Management
- Creating a DB Instance
- Querying DB Instances
- Querying DB Instances
- Deleting a DB Instance
- Querying Details of a DB Instance
- Querying Details of DB Instances in Batches
- Querying Details of a DB Instance
- 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
- Modifying DB Instance Specifications
- Backup Management
- Parameter Template Management
- Quota Management
- Database Proxy
- Log Management
- Task Information Queries
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
-
FAQs
- Product Consulting
- Resource Freezing, Unfreezing, Release, Deletion, and Unsubscription
-
Database Connections
- What Should I Do If I Can't Connect to My TaurusDB Instance?
- What Should I Do If an ECS Can't Connect to a TaurusDB Instance?
- Can an External Server Access a TaurusDB Instance?
- What Is the Maximum Number of Connections to a TaurusDB Instance?
- What Do I Do If There Are Too Many Database Connections?
- Are There Any Risks If There Are Too Many Connections to a TaurusDB Instance?
- What Should I Do If the Network Connectivity Test Fails?
- Can I Access a TaurusDB Instance over an Intranet Connection Across Regions?
- How Do I Check the Connections to a TaurusDB Instance?
- How Do I Enable Availability Detection for a Connection Pool in the Service Code?
- Client Installation
- Database Migration
- Database Permissions
-
Database Performance
- What Should I Do If the CPU Usage of My TaurusDB 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?
- How Can I Use Temporary Disks of TaurusDB?
- What Is the CPU Usage of a TaurusDB Instance with Empty Load?
-
Database Usage
- Why Are the Results Inconsistent After the MATCH AGAINST Statement Is Executed, Respectively, on Primary Nods and Read Replicas?
- How Do I Add Columns Using INSTANT?
- How Do I Use LOAD DATA to Import Local Data?
- How Do I Write Data to or Create Indexes for an Ultra-large Table?
- What Are the Risks of Deleting an Index from an Ultra-large Table?
- Backups
-
Database Parameter Modification
- How Do I Change the Time Zone of a TaurusDB Instance?
- How Do I Configure a Password Expiration Policy for TaurusDB Instances?
- How Do I Ensure that the Database Character Set of a TaurusDB Instance Is Correct?
- How Do I Use the utf8mb4 Character Set to Store Emojis in a TaurusDB Instance?
- How Do I Set Case Sensitivity for TaurusDB Table Names?
- Can I Use SQL Commands to Modify Global Parameters of My TaurusDB Instance?
- Network Security
-
Log Management
- Can I Enable general_log for TaurusDB?
- How Do I View All SQL Statements Executed by TaurusDB?
- How Do I Enable and View Binlog of My TaurusDB Instance?
- How Do I Change the Binlog Retention Period?
- How Do I View Deadlock Logs of TaurusDB?
- Why Are Slow SQL Statements Displayed in Slow Query Log Monitoring, but No Information About Them Is Displayed on the Slow Query Logs Tab Page in the Logs Module?
- Version Upgrade
-
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 Privileges 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
-
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
- A Large Number of SELECT Requests Routed to The Primary Instance After Database Proxy Is Enabled
- 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
- Duplicate Data Exists After ORDER BY LIMIT Is Executed
- Error Message Reported When select * from sys.innodb_lock_waits Is Executed
- Parameter-related Issues
-
Performance Issues
- High CPU Usage
- Out of Memory (OOM) Errors
- Tablespace Bloat
- Read Replica Uses Far More Storage Than the Primary Node
- Slow SQL Execution Due to Hot and Cold Data Problems
- Full Storage Caused by Complex Queries
- Slow Response Due to Deadlocks
- CPU Usage Increase
- CPU Resource Exhaustion Caused by Too Many Concurrent Slow Queries
-
Basic Issues
- How Do I View the Used Storage of My TaurusDB 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
- "handle_sync_msg_from_slave my_net_read error:-1" Displayed on the Error Logs Tab Page
- ERROR 1290 (HY000): The MySQL server is running with the --sql-replica-on option so it cannot execute this statement
-
Backup and Restoration Issues
- Videos
- General Reference
Copied.
Buying and Connecting to a Multi-primary Instance
Scenarios
This section describes how to buy a multi-primary instance on the TaurusDB console and connect to it through a proxy instance.
Billing
Multi-primary instances only support pay-per-use billing. After buying a multi-primary instance, you will be billed for resources you actually use. For billing details, see Pay-per-Use Billing.
Constraints
- To use multi-primary instances, submit a request by choosing Service Tickets > Create Service Ticket in the upper right corner of the management console.
- Multi-primary instances only support pay-per-use billing.
- Multi-primary instances can only be created when the kernel version is 2.0.45.230950.
Prerequisites
- You can create an IAM user or user group on the IAM console and grant it specific operation permissions, to perform refined management on Huawei Cloud. For details, see Creating a User and Granting TaurusDB Permissions.
- Your account balance is not below zero.
Procedure
Step 1: Buy a Multi-primary Instance
- Go to the Buy DB Instance page.
- On the displayed page, select Pay-per-use for Billing Mode, configure required information, and click Next.
Table 1 Basic information Parameter
Description
Billing Mode
Select Pay-per-use.
Region
Region where the instance is deployed
NOTICE:- Regions are geographic areas isolated from each other. Resources are region-specific and cannot be used across regions through internal network connections. For lower network latency and quicker resource access, select the nearest region.
- You cannot change the region of an instance once it is purchased.
DB Instance Name
The name must start with a letter and consist of 4 to 64 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.
- If you create multiple instances at a time, a hyphen (-) followed by a number with four digits will be appended to the instance name, starting with -0001. For example, if you enter instance, the first instance will be named instance-0001, the second instance-0002, and so on.
- The names for instances created in batches must consist of 4 to 59 characters. Only letters, digits, hyphens (-), and underscores (_) are allowed.
DB Engine Version
TaurusDB V2.0
Kernel Version
Select 2.0.45.230950. For details about the updates in each minor kernel version, see TaurusDB Kernel Version Release History.
NOTE:
To specify this parameter, submit a request by choosing Service Tickets > Create Service Ticket in the upper right corner of the management console.
DB Instance Type
Select Multi-primary.
A multi-primary instance can contain 2 to 63 primary nodes, with no read replicas. Such an instance can process multiple reads and writes, delivering excellent read/write performance at high concurrency.
Storage Type
- DL6
The original Shared storage. The default storage type of TaurusDB instances created before July 2024 is Shared storage, while that of TaurusDB instances created in July 2024 and beyond is DL6.
DL6-based instances achieve zero RPO with a 3-AZ deployment and deliver better performance and higher peak throughput. They are suitable for core application systems that are sensitive to performance and have demanding requirements on storage I/O during peak hours, such as those in finance, e-commerce, government, and gaming.
- DL5
A new storage type. With Huawei Cloud's hardware and network infrastructure technologies, DL5-based instances maintain the same high availability as DL6-based instances with 3 AZs and zero RPO.
Compared with DL6-based instances, although the peak performance of DL5-based instances may decrease, the cost per unit capacity is significantly reduced. DL5-based instances are suitable for CPU-intensive sub-core business systems or application modules that focus on minimal costs.
For more information about storage types, see Storage Types.
AZ Type
An AZ is a physical region where resources have their own independent power supply and networks. AZs are physically isolated but interconnected through an internal network. Some regions support both single-AZ and multi-AZ deployment and some only support single-AZ deployment.
- Single-AZ: All read/write nodes are deployed in the same AZ.
- Multi-AZ: The read/write nodes are evenly deployed in different AZs to ensure high reliability.
Time Zone
You need to select a time zone for your instance based on the region hosting your instance. The time zone is selected during instance creation and cannot be changed after the instance is created.
Table 2 Specifications and storage Parameter
Description
Instance Specifications
TaurusDB is a cloud-native database that uses the shared storage. To ensure workload stability in high read/write pressure, the system controls the read/write peaks of DB instances based on instance specifications. For details about how to select specifications, see Performance White Paper.
CPU Architecture
Select x86 or Kunpeng.
- x86: x86 instances use Intel® Xeon® Scalable processors and feature robust and stable computing performance. When working on high-performance networks, the instances provide the additional performance and stability that enterprise-class applications demand.
- Kunpeng: Kunpeng instances use Kunpeng 920 processors and 25GE high-speed intelligent NICs for powerful compute and high-performance networks, making them an excellent choice for enterprises needing cost-effective, secure, and reliable cloud services.
Nodes
This parameter is mandatory for multi-primary instances. Each multi-primary instance requires at least two primary nodes. You can create up to 63 primary nodes at a time. All primary nodes are both readable and writable.
You can also add read/write nodes after an instance is created. For details, see Adding Read/Write Nodes to a Multi-primary Instance.
Storage
It contains the system overhead required for inodes, reserved blocks, and database operations.
Storage will be scaled up dynamically based on the amount of data that needs to be stored, and is billed hourly on a pay-per-use basis.
Backup Space
TaurusDB provides free backup space equal to the amount of your used storage. After the free backup space is used up, you will be billed for the additional space on a pay-per-use basis.
Table 3 Network Parameter
Description
VPC
- A dedicated virtual network where your instance is located. It isolates networks for different workloads to enhance security.
TaurusDB allocates a default VPC (default_vpc) for your instance. You can also use an existing, new, or shared VPC and subnet.
- To use an existing VPC and subnet, select an existing VPC and subnet under the current account from the drop-down lists.
- To use a new VPC and subnet, create a VPC and subnet, and then select the VPC and subnet from the drop-down lists.
For details about how to create a VPC and subnet, see "Creating a VPC and Subnet" in Virtual Private Cloud User Guide.
- To use a shared VPC and subnet, select a VPC and subnet that another account shares with the current account from the drop-down lists.
With Resource Access Manager (RAM), you can share subnets in a VPC with one or more accounts, so you can easily configure and manage multiple accounts' resources at low costs.
For more information about VPC subnet sharing, see VPC Sharing in Virtual Private Cloud User Guide.
NOTICE:After a DB instance is created, the VPC cannot be changed.
Security Group
Enhances security by controlling access to TaurusDB from other services. When you select a security group, you must ensure that it allows the client to access instances.
If no security group is available or has been created, TaurusDB allocates a security group to your instance by default.
NOTE:
To ensure subsequent database connections and access, click Add Inbound Rule to allow all IP addresses to access your DB instance through port 3306 and over ICMP.
Table 4 Database proxy Parameter
Description
Database Proxy
You must enable Database Proxy for multi-primary instances. Then you can use proxy addresses to connect to your databases.
Proxy Instance Specifications
You can select the proxy instance specifications as needed.
Proxy Instance Nodes
You can create 2 to 16 proxy instance nodes.
Table 5 Database configuration Parameter
Description
Administrator
The default login name for the database is root.
Administrator Password
It must consist of 8 to 32 characters and contain at least three of the following: uppercase letters, lowercase letters, digits, and special characters (~!@#%^*-_=+?,()&$|.). Enter a strong password and periodically change it to improve security and defend against threats such as brute force cracking attempts.
NOTICE:If you select a custom parameter template during instance creation, the administrator password must comply with the values of validate_password parameters in the custom parameter template. Otherwise, the instance creation will fail.
To check the parameter values, go to the Parameter Templates page, find the target parameter template and click its name. In the upper right corner of the page, search for validate_password.
Keep this password secure. If lost, the system cannot retrieve it.
After an instance is created, you can reset this password. For details, see Resetting the Administrator Password.
Confirm Password
Enter the administrator password again.
Table 6 Parameter template Parameter
Description
Parameter Template
Contains engine configuration values that can be applied to one or more instances.
In the drop-down list, you can view the default parameter template (Default-TaurusDB V2.0), the high-performance parameter template (Default-GaussDB-for-MySQL 8.0-High Performance), and all custom parameter templates in the current region. You can select an appropriate parameter template as required.
NOTICE:- If you select a custom parameter template when creating a DB instance, the following specification-related parameters in the custom template are not applied. Instead, the default values are used.
innodb_log_buffer_size
max_connections
innodb_buffer_pool_instances
innodb_page_cleaners
innodb_parallel_read_threads
innodb_read_io_threads
innodb_write_io_threads
threadpool_size
- The value of innodb_parallel_select_count is determined by your instance specifications, instead of the parameter value you configured in the parameter template. The default value is OFF for instance with 16 vCPUs or less and ON for instances with more than 16 vCPUs.
For more information about parameter templates, see Parameter Template Management. For more information about the high-performance parameter template, see Introducing the High-Performance Parameter Template.
You can modify the instance parameters as required after a DB instance is created. For details, see Modifying Parameters of a DB Instance.
Table Name
Specifies whether table names are case sensitive. This option cannot be changed later.
- Case sensitive: Table names are case sensitive.
- Case insensitive: Table names are case insensitive and are stored in lowercase letters by default.
Enterprise project
This parameter is for enterprise users. To specify it, submit a request by choosing Service Tickets > Create Service Ticket in the upper right corner of the management console.
An enterprise project provides a way to manage cloud resources and enterprise members on a project-by-project basis.
You can select an enterprise project from the drop-down list. The default project is default.
Table 7 Tag Parameter
Description
Tag
Tags a DB instance. This parameter is optional. Adding tags to DB instances helps you better identify and manage the DB instances. Each DB instance can have up to 20 tags.
NOTE:
The performance of a DB instance depends on its configurations. Hardware configuration items include the instance specifications, storage type, and storage space.
- Confirm the specifications of the pay-per-use instance.
- If you need to modify your settings, click Previous.
- If you do not need to modify your settings, click Submit.
- To view and manage DB instances, go to the Instances page.
- During the creation process, the instance status is Creating. After the status of the instance is Available, you can use the instance.
- Automated backup is enabled by default during instance creation. After your instance was created, the backup policy cannot be disabled and a full backup will be automatically created.
- After the instance is created, you can confirm the DB instance type on the Instances page.
- After the instance is created, you can add a description.
- The default database port is 3306 and cannot be changed after the instance is created.
Step 2: Connect to the Multi-primary Instance Through a Proxy Instance
- Log in to an ECS.
- Connect to the instance through a proxy address.
mysql -h <hostIP> -P <port> -u <userName>
Table 8 Parameter description Parameter
Description
<hostIP>
Proxy address.
Click the multi-primary instance name, choose Database Proxy in the navigation pane, and view the proxy address in the proxy instance list.
<port>
Database port. By default, the value is 3306.
Click the multi-primary instance name, choose Database Proxy in the navigation pane, and view the database port in the proxy instance list.
<userName>
The username of the database administrator account. The default username is root.
Enter the password of the database account as prompted.
Enter password:
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