Distributed Database Middleware
Distributed Database Middleware
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- Modifying Parameters of a DDM Instance
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- Configuring a Parameter Template
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Parameter Template Management
- Creating a Parameter Template
- Editing a Parameter Template
- Comparing Two Parameter Templates
- Viewing Parameter Change History
- Replicating a Parameter Template
- Applying a Parameter Template
- Viewing Application Records of a Parameter Template
- Modifying the Description of a Parameter Template
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Data Migration
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- Scenario 4: Migrating Data from a Self-Built MySQL Instance to DDM
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API Reference
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APIs (Recommended)
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DDM Instances
- Buying a DDM instance
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- Modifying the Name of a DDM Instance
- Modifying the Security Group of a DDM Instance
- Deleting a DDM Instance
- Restarting a DDM Instance
- Reloading Table Data
- Scaling out a DDM instance
- Scaling in a DDM instance
- Modifying the Read Policy of the Associated DB Instance
- Synchronizing Data Node Information
- Querying Nodes of a DDM Instance
- Querying Details of a DDM Instance Node
- Querying Parameters of a Specified DDM Instance
- Modifying Parameters of a DDM Instance
- Querying DDM Engine Information
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DDM Instances
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Best Practices
- Overview
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- Migrating an Entire RDS Database to DDM
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- Accessing DDM Using a JDBC Connection Pool
- Logging In to a DDM Instance Using Navicat
- Migrating Data from RDS for MySQL to DDM Using DRS
- Performance White Paper
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FAQs
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DDM Usage
- How Does DDM Perform Sharding?
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- What Version and Parameters Should I Select?
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- What Do I Do If a Duplicate Primary Key Error Occurs When Data Is Imported into DDM?
- What Should I Do If an Error Message Is Returned When I Specify an Auto-Increment Primary Key During Migration?
- What Do I Do If an Error Is Reported When Parameter Configuration Does Not Time Out?
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Help Center/
Distributed Database Middleware/
User Guide/
Parameter Template Management/
Editing a Parameter Template
Editing a Parameter Template
Updated on 2022-09-16 GMT+08:00
To improve performance of a DDM instance, you can modify parameters in custom parameter templates based on service requirements.
You cannot change parameter values in default parameter templates.
The following are the key points you should know when using parameters from a parameter template:
- After you change a parameter value and save the change, the change will take effect only after you apply the parameter template to a DDM instance and manually restart the instance. For details, see Applying a Parameter Template.
- The time when the modification takes effect is determined by the type of the parameter.
NOTE:
Parameters in default parameter templates cannot be modified. You can view these parameters by clicking template names. If a custom parameter template is set incorrectly and causes an instance restart to fail, you can re-configure the custom parameter template according to configurations of the default parameter template.
Procedure
- Log in to the management console.
- Click
in the upper left corner and select a region and a project. - Click
in the upper left corner of the page and choose Databases > Distributed Database Middleware. - Choose Parameter Templates, click the Custom Templates tab, locate the required parameter template, and click its name.
- On the Parameter Details page, modify parameters as needed.
Available operations are as follows:
Figure 1 Modifying parameters in a parameter template
- To save the modifications, click Save.
- To cancel the modifications, click Cancel.
- After the parameter values are modified, click Template History to view details.
NOTICE:
The modifications take effect only after you apply the parameter template to DDM instances. For details, see Applying a Parameter Template.
If you have modified certain parameters or collations, you need to manually restart the DDM instance for the modifications to take effect. However, the restart caused by node class changes (if any) does not make these modifications take effect.
Parent topic: Parameter Template Management
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