The Sort that Spills to Level 15,000
Paul White shows that SQL Server sometimes produces very misleading information about the impact of sort operations.
2016-10-24
3,412 reads
Paul White shows that SQL Server sometimes produces very misleading information about the impact of sort operations.
2016-10-24
3,412 reads
It is always bad news if your SQL queries are having to use the SORT operator. It is worse news if you get a warning that sort operations are spilling onto TempDB. If you have a busy, slow TempDB, then the effect on performance can be awful. You should check your query plans to try to eliminate SORTs and never leave a SORT warning unheeded. Fabiano Amorim shows the range of ways of getting information on what is going on with a query that is doing a SORT and when requests are made for memory.
2015-04-13
8,822 reads
Ready to dive into the world of SQL? Whether you're dreaming of a lucrative...
This comic was retweeted into my timeline on Twitter (I refuse to call it...
By Steve Jones
Recently I’ve been looking at archiving some data at SQL Saturday, possibly querying it,...
Comments posted to this topic are about the item Creating a CSV Parser in...
Hello experts, We set up the Brent Ozar SQL Agent alerts, one of which...
Hi as you can see at https://www.sqlservercentral.com/forums/topic/test-sql-servers#post-4422832 we would really like multiple instances in...
I want to enable two trace flags, 4199 and 4137, for a single query. How should I do this:
-- A SELECT a.AddressID , a.AddressLine1 , a.AddressLine2 , a.City , a.StateProvinceID , a.PostalCode , p.FirstName , p.LastName FROM Person.Address a INNER JOIN person.Person AS p ON p.rowguid = a.rowguid WHERE City = 'SEATTLE' AND PostalCode = 98104 OPTION (QUERYTRACEON 4199, 4137); -- B SELECT a.AddressID , a.AddressLine1 , a.AddressLine2 , a.City , a.StateProvinceID , a.PostalCode , p.FirstName , p.LastName FROM Person.Address a INNER JOIN person.Person AS p ON p.rowguid = a.rowguid WHERE City = 'SEATTLE' AND PostalCode = 98104 OPTION (QUERYTRACEON 4199, QUERYTRACEON 4137); -- C SELECT a.AddressID , a.AddressLine1 , a.AddressLine2 , a.City , a.StateProvinceID , a.PostalCode , p.FirstName , p.LastName FROM Person.Address a INNER JOIN person.Person AS p ON p.rowguid = a.rowguid WHERE City = 'SEATTLE' AND PostalCode = 98104 OPTION (QUERYTRACEON 4199), (QUERYTRACEON 4137);See possible answers