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CPU Monitoring in SQL Server with Datadog

Kendra Little has a recommendation:

What makes me a raving fan is the flexibility of Datadog’s notebooks and dashboards, combined with the ability to create all sorts of custom metrics and monitors. There are always things in SQL Server monitoring packs that I have strong opinions about. Datadog lets me take what I want, build what I need that isn’t contained in that, and ignore the rest. For a team that has the budget to afford Datadog paired with dedicated database staff with the time and resources to do this work, this can be a great fit.

One of the weirdest and worst parts of the Datadog SQL Server monitoring tooling, though, is how it handles wait stats. In my opinion, it’s a case of someone reinventing a wheel that didn’t need to be reinvented, and then not documenting what they did clearly (at least not in a way I can find).

Two of the most confusing Datadog “waits” are labeled “CPU” and “Waiting on CPU”. I opened a support ticket with Datadog a while back to ask what these are, because I couldn’t find any way they correspond to actual wait stats in SQL Server. I learned they aren’t wait stats at all. In fact, I think you should largely ignore them. Here’s why.

Read on for the full story.

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