* It will flip back & forth, and then settle on a number which may not be good either * Your memory grant will drop, CAUSING spills The good news: your memory grant will change, preventing spills and RESOURCE_SEMAPHORE. * Here comes our American friend again: */ SQL Server has a new tool to help: adaptive memory grants. The bad news: now they're vulnerable to parameter sniffing. The good news: table variables get stats. * It accurately estimates rows for the table variableĮXEC usp_PostsByUserLocation = 'Boston, MA, USA' SQL Server 2019 is quite a bit faster because: * Which leads to single-threaded processing and a low memory grantĮXEC usp_PostsByUserLocation = 'United States' * Underestimates rows in the table variable, LEFT OUTER JOIN dbo.Users uC ON c.UserId = uC.IdĮXEC usp_PostsByUserLocation = 'United States%'
LEFT OUTER JOIN dbo.Comments c ON p.Id = c.PostId JOIN dbo.Posts p ON p.OwnerUserId = u.Id AND p.PostTypeId = 1 SELECT Id FROM dbo.Users WHERE Location LIKE TOP 1000 p.Score, p.Id, p.Title, p.Body, p.Tags, uC.DisplayName, c.Text SELECT * FROM You probably still find stored procedures with table variables: */ĬREATE OR ALTER PROC dbo.usp_PostsByUserLocation NVARCHAR(40) AS Or.just switch to 2019 compatibility level:ĪLTER DATABASE CURRENT SET COMPATIBILITY_LEVEL = 150 /* 2019 */ SELECT * FROM Possible solutions in the past: change the code to add recompile hint, temp tables SELECT * FROM TABLE (Make VARCHAR(30), Model VARCHAR(30)) Run these demos one at a time.', 20, 1) WITH LOG ĬREATE INDEX IX_Reputation ON dbo.Users(Reputation) ĬREATE INDEX IX_Location ON dbo.Users(Location) ĬREATE INDEX IX_OwnerUserId ON dbo.Posts(OwnerUserId) INCLUDE (Score, Title) ĬREATE INDEX IX_PostId ON dbo.Comments(PostId) ĪLTER DATABASE SCOPED CONFIGURATION SET LAST_QUERY_PLAN_STATS = ON ĪLTER DATABASE CURRENT SET COMPATIBILITY_LEVEL = 140 /* 2017 */ĭECLARE TABLE (Make VARCHAR(30), Model VARCHAR(30)) RAISERROR(N'Oops! No, don''t just hit F5. This first RAISERROR is just to make sure you don't accidentally hit F5 and For full details, see the end of this file. What's New in SQL Server 2019: 100% Demos To follow along, download the Stack Overflow database – any size will work, but onstage, I use the mid-size (50GB) Stack Overflow 2013 database. No slides here – not even an about-me slide. I’ll show you what kinds of code will benefit the most so you can go back to the office and have an honest discussion with management about what to expect. I’ll focus on just the features that make the biggest bang for the buck, things you can implement right away and see a noticeable difference. I’m Brent Ozar, and I’ll give you the whirlwind tour. You don’t have time to rewrite all your queries or learn new languages – you just want the database to go faster. You want to see a series of real-world demos focusing on the features of SQL Server 2019 that will make your users happier with as little work as possible on your part. You haven’t installed SQL Server 2019 yet, and you don’t want to sit through a bunch of slides.
Doesn't like when our Director takes a ticket, resolves it.Want to learn more? Check out my recent SQL Server 2019 posts. Things like, she doesn't like when we have more than two pages of tickets (two pages minimum, one page is the dream). I was just thinking of some pet peeves my coworker has regarding our helpdesk.
I couple of laptops that were joined to local DC. Hi.I'm strugling with connecting laptop with Win 10 to O365 instead of using local domain. Connect Windows 10 to O365 instead of Local Domain Windows.Nevertheless, DataStage fails with this error:". Hello,I am facing an error while trying to read data from a delimited file from file system.Fields are delimited by ~ (tilde)Īnd file connector properties are as follows:File is encoded in us-ascii. DataStage 11.7 - Field Delimiter Not Found - File Connector Programming & Development.