If you asked me, prior to today, if I would type or say those words, I would have laughed right at you. But then, I saw this question on Ask SQL Server Central. It's from a college student, not yet twenty-one, who was considering paying his (assuming it's a guy since their handle is 'Eagle Scout') own way to the Summit and wondered if it would be worth it. It pains me to say that I suggested that he not do it. Don't get me wrong. I think the PASS Summit is probably the single greatest resource you have to advance your career. Where else can you go to get that broad a choice in training? Where else can you go to get that many of the leaders of our industry, specializing…
Good question. I don’t have a clue. So let’s set up a test. I’ll create this stored procedure: CREATE PROCEDURE DL2e WITH ENCRYPTION AS BEGIN TRANSACTION UPDATE Purchasing.PurchaseOrderDetail SET OrderQty = 2 WHERE ProductID = 448 AND PurchaseOrderID = 1255; Then I’ll execute things in the following order. From one connection this query: UPDATE Purchasing.PurchaseOrderHeader SET Freight = Freight * 0.9 --9% discount on shipping WHERE PurchaseOrderID = 1255; From a second connection, my stored procedure: EXEC dbo.dl2e; Then, back on the first connection, this query: UPDATE Purchasing.PurchaseOrderDetail SET OrderQty = 4 WHERE ProductID = 448 AND PurchaseOrderID = 1255; That will generate a deadlock. It’s a straight-forward classic deadlock. I’m using extended events to capture the deadlock graph and the output looks like this: <deadlock> <victim-list> <victimProcess id="process472310928" />…
There are four different ways you can get information about deadlocks in your system. These are: traceflag 1204 traceflag 1222 trace events extended events For years I’ve been pushing traceflag 1222 as the best of the lot. Well, that’s over. I’ve been learning more and more about extended events and I’m currently in love with xml_deadlock_report event. Why? Simple, it has everything that traceflag 1222 has, but there are two glorious things about it. First, it’s not going to be filling up my error log with, for the error log, noise. Seriously. As much as I liked the information displayed from traceflag 1222, I didn’t like what it did to the log, but I saw it as a necessary evil. Second, it’s XML baby! That means you can set up…
Microsoft is supporting an effort by PragmaticWorks targeted at supporting technical training for returning veterans. I can’t think of a single better cause to throw some support behind. Not one. They’re going to donate money based on posts about #sqlfamily. Well done to Brian Knight (blog|twitter) and all the team at PragmaticWorks. I knew you were great people, I just didn’t know how great. Thanks to Microsoft and the SQL Server Team for their support of Brian. Oh, and for all the work you guys do with SQL Server. I may bitch about you guys more than you’d like, but it’s only because I live inside your software, constantly. I wouldn’t be there all the time if you didn’t do great work. Keep it up. We can talk about this…
Andy Warren posted a question the other day (well, issued a challenge actually), “What Should PASS Be?†I’ll let you go and read that & wait here… Done? Cool. Moving on. I have thoroughly enjoyed my associations with PASS over the years. I’ve been a first-time attendee, a volunteer and a presenter at the PASS Summit. I’ve volunteered with the PASS organization with the Special Interest Groups, the Editorial Committee, and as Editor of the SQL Standard. I’ve taken part in 24 Hours of PASS as a presenter, host and attendee. I have helped to put on SQL Saturday events, attended them and presented at them (and we have another one coming up on April 2nd in the Boston area, please register here.). I was one of the founding officers…
I only half listened to the key notes. The party's the preceding night may have had something to do with it. First session was with Kalen Delaney on Plan Guides. She didn't really do plan guides though. Instead she talked about guiding plans. She is such a great presenter. I like her use of the language and precise definitions. Lubor Kollar (sp?) was in the room and made a point of standing up & addressing some of Kalen's info. My best take away was that plan guides (she covered those too) do not reduce compile time and can in fact increase compile time. Second best was the use of plan guides as a mechanism for testing since you can apply the guide, enable & disable, without rewriting the proc. Sessions…