A demo script for keeping CPU busy: I wrote this query at an event to simulate high CPU usage, and it pushed CPU from 10% to 80%.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
SQLAuthority News – Uncut and Unedited Video Interview of Pinal Dave
Lohith from Bangalore took my Uncut and Unedited video interview, with a few personal questions, a few technical ones and a few secrets shared.
SQLAuthority News – Pinal Dave: Blogger, MVP and now Interviewee by Michael J Swart
Michael J Swart asked me about life beyond SQL Server, from family memories to writing in English. Read the original interview and see the caricature Michael created for it.
Wait Stats Summary: Every Wait on One Page
This wait stats summary puts every wait from the series on one page: what it means and the first fix to try. On Night 28 at the Clipboard Diner, the critic finally comes on an ordinary Tuesday. The lesson of the whole series is the same as the story’s: know what normal looks like on your server.
Wait Stats Troubleshooting: From Top Wait to First Fix
Wait stats troubleshooting comes down to one habit: find the top real wait, ask its first question, and try one fix. On Night 27 at the Clipboard Diner, Casey tapes a one-page chart to the fridge. Here is that chart for SQL Server, plus one query that shows your top waits with their share and signal percent.
Batch Mode Wait Stats: HTBUILD and Columnstore Waits
Batch mode wait stats such as HTBUILD and BPSORT show threads waiting for each other inside a parallel batch mode plan. On Night 26 at the Clipboard Diner, four cooks wait for one giant shared tray before 900 cookies can bake. Then I show when these waits are normal, when skew or spills make them a problem, and how to check them.
RESOURCE_SEMAPHORE Wait Stats: Memory Grant Waits
RESOURCE_SEMAPHORE wait stats mean a query is waiting for memory before it can even start. On Night 25 at the Clipboard Diner, a wedding party reserves the whole counter and two birthday parties wait. Then I show how to find waiting grants, why grants grow too big, and the fixes I try first.
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