For an instructor lead, in-depth look at learning SQL click below.
The Resource Governor, an essential feature of SQL Server, is a powerful tool that enables you to manage SQL Server workload and resources by specifying limits on resource consumption. Its primary purpose is to manage CPU, physical IO, and memory usage based on the priorities of your workload.
Understanding Resource Governor
The SQL Server Resource Governor helps you to specify the minimum and maximum number of CPU, physical IO, and memory resources that user sessions and requests can consume. This capacity to control and distribute resources more effectively can improve application performance, especially in a shared resources environment.
Creating Resource Pools and Workload Groups
Resource Governor works by classifying incoming connections and routing them to a specific group known as a workload group. You need to create resource pools and workload groups before turning on the Resource Governor. Below is an example of how to create them:
|
1 2 3 4 5 6 |
CREATE RESOURCE POOL FastLane; GO CREATE WORKLOAD GROUP QuickTasks USING FastLane; GO |
Configuring the Classifier Function
After creating the resource pools and workload groups, you need to define a classifier function. This function determines into which groups incoming connections are placed. Here is an SQL code example of setting a classifier function:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
CREATE FUNCTION dbo.Classifier() RETURNS SYSNAME WITH SCHEMABINDING AS BEGIN IF (SUSER_NAME() LIKE '%username%') RETURN 'QuickTasks' RETURN 'Default' END; GO ALTER RESOURCE GOVERNOR WITH (CLASSIFIER_FUNCTION = dbo.Classifier); GO |
Enabling Resource Governor
Once the resource pools, workload groups, and classifier functions are setup, you can enable the Resource Governor using the following SQL code:
|
1 2 3 4 |
ALTER RESOURCE GOVERNOR RECONFIGURE; GO |
Conclusion
The SQL Server Resource Governor gives you more control over the resource management of your SQL Server instances. It’s a critical tool for managing the shared resources in your data server environment. With it, you can prevent resource-hungry processes from monopolizing your resources and ensure a smooth performance for all your applications.