¿Establecer Nocount en mejora el rendimiento?

Does set Nocount on improve performance?

When you use SET NOCOUNT OFF; the count is returned. Using SET NOCOUNT ON can improve performance because network traffic can be reduced. SET NOCOUNT ON prevents SQL Server from sending DONE_IN_PROC message for each statement in a stored procedure or batch of SQL statements.

SET NOCOUNT ON prevents the sending of DONE_IN_PROC messages to the client for each statement in a stored procedure.

A handful of PRINT statements will have a negligible effect on performance – PRINT s in loops that are executed many thousands of times, however, may well cause performance issues.

How to Suppress the Message. If you want to suppress this message, then you can use the “SET NOCOUNT” statement.

“Stored procedures are precompiled and cached so the performance is much better.” This depends on the query, for simple queries it is best written and executed as a query itself.

Tips to Increase Database Performance

1. Tip 1: Optimize Queries.
2. Tip 2: Improve Indexes.
3. Tip 3: Defragment Data.
4. Tip 4: Increase Memory.
5. Tip 5: Strengthen CPU.
6. Tip 6: Review Access.
7. SolarWinds Database Performance Analyzer (DPA)
8. SolarWinds Database Performance Monitor (DPM)

no, there is no database wide setting for SET NOCOUNT . KM. You could use the NH IInterceptor interface’s OnPrepareStatement method to modify the NH-generated SQL statements to include a “set nocount off” statement at the top of every sql query issued by your application.

If you do not want to know how many rows were impacted by your SQL Statement, it is a good idea to use SETNOCOUNT ON and turn off the message. In simple words, if you do not need to know how many rows are affected, SET NOCOUNT ON as it will reduce network traffic leading to better performance.

It certainly can be. Printing to a terminal involves rendering and other things (non-trivial) and is typically buffered a lot less. The OS and stream implementation can do a lot more buffering and caching with file I/O.

We can reduce the network bandwidth with the SET NOCOUNT ON option in the stored procedures or T-SQL statements. It might not improve the query performance drastically, but definitely, it puts an impact on the processing time, reducing the network bandwidth and client processing times.

Sometimes even the simplest things can make a difference. One of these simple items that should be part of every stored procedure is SET NOCOUNT ON. This one line of code, put at the top of a stored procedure turns off the messages that SQL Server sends back to the client after each T-SQL statement is executed.

As you can see SET NOCOUNT OFF is consistently slower than SET NOCOUNT ON. All in all results for this experiment reveal a 3% performance advantage in having SET NOCOUNT ON.

Although I have known that there was a performance benenfit in using SET NOCOUNT ON and qualifying objects with their owners I had never actually established benchmarks against either of these two practices.