Statistics on Andy M Mallon - AM²

Not all stats should be auto-updated

Thu, 29 Aug 2024 11:19:07 -0400

Statistics auto-updates are generally a good thing–auto-update of statistics is the default behavior in SQL Server. Having the freshest information about the data “shape” helps to inform the best selection of an execution plan for queries.

Except for when it doesn’t.

Because It Depends™️

Let’s talk about the trade-offs.

Cardinality , Parallel Hint alternative for MS-SQL

Wed, 31 Mar 2021 10:41:44 -0400

Question

UPDATE MARK M SET ARCHIVE_FLAG = 'N' WHERE EXISTS 
(SELECT /*+ cardinality(S1, 10) parallel(S1,8)*/ 1 FROM SHFASG S, SHIFT S1 
WHERE S.ID = S1.ID AND M.ID = S.MARKID AND ARCHIVE_FLAG <> 'Y');

This is the oracle query that I have, I want to create similar query for my MS SQL DB, Any help please

sp_autostats: object-level auto update statistics

Tue, 15 Dec 2015 11:00:00 -0500

In SQL Server, auto-update statistics is a database level setting. It’s right there:

I’m not going to say whether I think Auto Update Statistics should be on or off. Instead, I’m going to argue that there are definitely scenarios when you want to have this on AND there are scenarios where you want it turned off. Can you really have this both ways? Absolutely.