September 2007
Intermediate to advanced
448 pages
13h 52m
English
book
Inside Microsoft® SQL Server™ 2005: Query Tuning and Optimization
by Kalen Delaney, Sunil Agarwal, Craig Freedman, Ron Talmage, Adam Machanic
Content preview from Inside Microsoft® SQL Server™ 2005: Query Tuning and Optimization
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Troubleshooting Blocking
Blocking is a general term that can have several meanings, but in the context of concurrency, it refers to SQL Server processes that are prevented from completing their tasks because they are waiting on activities from other processes. More specifically, blocking usually refers to user processes that are caused to wait by other user processes because they need to access and lock data resources such as rows, pages, indexes, or tables in a database.
A task may also wait for latches, which are lower-level synchronization primitives. Such latch waits usually relate to I/O or other server configuration issues, and not to the type of blocking we are focusing on here. For more information on waiting caused by latches, see “Waiting ...
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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.