SQL Server Field Notes by Jeff Iannucci

Month: February 2022

How can a table with 0 records use so much space?

Just like that puppy you got during the pandemic, your databases hunger for more. And they grow. And occasionally make a mess. I’ll stop the analogy.

Anyhow, it’s worthwhile to occasionally review the tables in a database to see which ones are growing every day, using the most space.

But what if during a review you see the largest table looks like this?

That’s around 24 GB of sweet drive space allocated for 0 records. But…how?

Let me show you how.

How to get Change Data Capture to work in an Availability Group

If you’ve ever had to implement Change Data Capture (CDC) for a database in an Availability Group, then you know that the CDC jobs don’t really consider the Availability Group. The capture and cleanup jobs created are set up as if the database exists only on a single instance.

And that’s a problem, because I would guess quite lot of databases are in Availability Groups. Maybe even some of yours. If you have this issue, I’ve put together a step-by-step solution in this post.

I know this post is a little long compared to others here, but I’ve tried to be thorough to save you headaches.

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