November 2006
Intermediate to advanced
1232 pages
34h 10m
English
book
Microsoft® SQL Server™ 2005 Administrator's Companion
by Edward Whalen, Marcilina Garcia, Burzin Patel, Stacia Misner, Victor Isakov
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Blocking and Deadlocks
Blocking and deadlocks are two events that can occur with concurrent transactions. Sometimes they are desirable because they help maintain data consistency, and sometimes they are not desirable because of possible performance degradation for users. Blocking and deadlocks both relate to locking.
Blocking occurs when one transaction is holding a lock on a resource and a second transaction requires a conflicting lock type on that resource. The second transaction must wait for the first transaction to release its lock—in other words, it is blocked by the first transaction. If a transaction holds a lock for an extended period, it can cause a chain of blocked transactions that are waiting for the first transaction to finish so ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.