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Optimization: Set Nocount On

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When you have a lot of updates and inserts or deletes in a stored procedure it is good to set nocount to on. SQL server can become really chatty when this setting is off; this will waste bandwith and CPU power. If a proc is called 30 times a second and you do 3 DML operations then that will result in 90 n row(s) affected) messages

set nocount on should be the first statement in the proc after the parameters and the AS. Example:

  1. CREATE PROC Employee
  2. @Param1 INT
  3. AS
  4. SET NOCOUNT ON
  5.  
  6. ...rest OF PROC


Contributed by: --SQLDenis 15:25, 31 May 2008 (GMT)


Part of SQL Server Programming Hacks - 100+ List

Section Query Optimization

283 Rating: 2.5/5 (107 votes cast)