New whitepapers on latches and spinlocks published

Over the last few months I’ve been blogging occasionally about some pretty deep performance tuning topics, namely latches and spinlocks (see my blog categories Wait Stats, Latches, and Spinlocks). Ewan Fairweather and Mike Ruthruff of the SQLCAT team have written some really excellent whitepapers on interpreting and dealing with latch and spinlock issues, which I […]

SOS_SCHEDULER_YIELD waits and the LOCK_HASH spinlock

Continuing my series on advanced performance troubleshooting – see these two posts for the scripts I’ll be using and an introduction to the series: Wait statistics, or please tell me where it hurts Advanced performance troubleshooting: waits, latches, spinlocks In this blog post I’d like to show you an example of SOS_SCHEDULER_YIELD waits occurring and […]

Advanced SQL Server performance tuning

It’s all very well having whizz-bang 3rd-party performance monitoring and troubleshooting tools, but sometimes you have to get deeper into what’s going on with SQL Server than any of these tools can go. Or you have to call┬áCustomer Support or Premier Support so *they* can dive in deeper. Typically you or they are going to […]

How to download a sqlservr.pdb symbol file

I just had to figure out how to do this so I figured a quick blog post is in order to save other people time in future. If you ever need to use windbg to debug a SQL Server crash dump, or you want to capture call stacks using extended events (e.g. when debugging excessive […]

Survey: have you ever used these DMVs?

In this week's survey I've got four mini-surveys for you, all to do with in-depth performance analysis. I'd like to know whether you've ever used each of four DMVs that look progressively more deeply into the workings of the database engine. I'll report on the results in a week or two and start blogging about […]