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SQL Man of Mystery

Wes Brown is a PASS chapter leader and SQL Server MVP. He writes for SQL Server Central and maintains his blog at http://www.sqlserverio.com. Wes is Currently serving as a Senior Lead Consultant at Catapult Systems. Previous experiences include Product Manager for SQL Litespeed by Quest software and consultant to fortune 500 companies. He specializes in high availability, disaster recovery and very large database performance tuning. He is a frequent speaker at local user groups and SQLSaturdays.

SQLDIY: Tracking Wait Stats

One of the most important methodologies to date for troubleshooting problems with the SQL Server engine is examining the wait statistics. As with most of the DMV’s provided in SQL Server 2005/2008 sys.dm_os_wait_stats is a cumulative view. To add to my series SQLDIY: Manage and Monitor SQL Server Yourself  here is my stored procedure for capturing deltas on an ongoing basis. It is modeled the same way I capture sys.dm_io_virtual_file_stats. This procedure captures the delta and the raw data at a point in time. This allows you to do your own roll ups to look at the numbers in different ways. Another reason I do this is to capture what happened before the problem and right at the beginning as the customer started reporting the problems. Starting with the slide deck from Joe Sack (blog|twitter) on Performance Tuning With Wait Statistics as a foundation and working through the links provided, you will be able to get up to speed quickly.

Link to the script Gather Server Wait Stats

I’m hosting all my scripts from this series on GitHub as I do with all my open source projects.

As always, if you find any bugs please let me know and I will correct them!

Your Homework:
SQL Server 2005 Waits and Queues Tom Davidson
SQL Server Waits and Queues Robert Pearl (blog|twitter)
SQL Server 2008 DR, Testing, Waits and Queues Jose Barreto (blog|twitter)
Drum Roll, Please…The Debut of The SQL DMV All-Stars Dream Team! Jimmy May(blog|twitter)

Specific examples on using wait stats:
Diagnosing Transaction Log Performance Issues and Limits of the Log Manager Mike Ruthruff (blog|twitter)
How do you measure CPU pressure? Tom Davidson


Comments

Posted by Jason Brimhall on 27 June 2011

nice stuff

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