Configure the query governor cost limit Server Configuration Option
This topic describes how to configure the query governor cost limit server configuration option in SQL Server 2012 by using SQL Server Management Studio or Transact-SQL. The query governor cost limit option specifies an upper limit on the time period in which a query can run. Query cost refers to the estimated elapsed time, in seconds, that is required to complete a query on a specific hardware configuration. The default value for this option is 0, which sets the query governor to off. This allows all queries to run without any time limitation. If you specify a nonzero, nonnegative value, the query governor disallows execution of any query that has an estimated cost that exceeds that value.
In This Topic
Before you begin:
Recommendations
Security
To configure the query governor cost limit option, using:
SQL Server Management Studio
Transact-SQL
Follow Up: After you configure the query governor cost limit option
Before You Begin
Recommendations
This option is an advanced option and should be changed only by an experienced database administrator or certified SQL Server technician.
To change the value query governor cost limit on a per-connection basis, use the SET QUERY_GOVERNOR_COST_LIMIT statement.
Security
Permissions
Execute permissions on sp_configure with no parameters or with only the first parameter are granted to all users by default. To execute sp_configure with both parameters to change a configuration option or to run the RECONFIGURE statement, a user must be granted the ALTER SETTINGS server-level permission. The ALTER SETTINGS permission is implicitly held by the sysadmin and serveradmin fixed server roles.
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Using SQL Server Management Studio
To configure the query governor cost limit option
In Object Explorer, right-click a server and select Properties.
Click the Connections page.
Select or clear the Use query governor to prevent long-running queries check box.
If you select this check box, in the box below, enter a positive value, which the query governor uses to disallow execution of any query with a running length exceeding that value.
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Using Transact-SQL
To configure the query governor cost limit option
Connect to the Database Engine.
From the Standard bar, click New Query.
Copy and paste the following example into the query window and click Execute. This example shows how to use sp_configure to set the value of the query governor cost limit option to 120 seconds.
USE AdventureWorks2012 ;
GO
EXEC sp_configure 'show advanced options', 1;
GO
RECONFIGURE ;
GO
EXEC sp_configure 'query governor cost limit', 120 ;
GO
RECONFIGURE;
GO
For more information, see Server Configuration Options (SQL Server).
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Follow Up: After you configure the query governor cost limit option
The setting takes effect immediately without restarting the server.
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Zobacz także
Odwołanie
SET QUERY_GOVERNOR_COST_LIMIT (Transact-SQL)