Press "Enter" to skip to content

Curated SQL Posts

Killing Blocking SPIDs with XESmartTarget

Published 2022-03-01 by Kevin Feasel

Gianluca Sartori continues a series on XESmartTarget:

For this post, the problem to solve is this: a session has an open transaction, is blocking other sessions, it’s been sleeping for a long time and it’s probably a good idea to kill it. This usually happens when there’s a problem in the application, that doesn’t handle transactions properly and leaves open transactions for a long time, maybe because it displays an error dialog, waiting for user input. There is very little that you can do in these cases: the blocked processes continue to pile up and the only thing left to do is kill the offending session.

Let’s see how to do that with XESmartTarget.

Let’s, shall we?

Comments closed

SQL Tools Updates

Published 2022-03-01 by Kevin Feasel

Timi Oshin has updates on SSMS and Azure Data Studio:

Azure Data Studio 1.35 now supports easier keyboard navigation in notebooks without mouse clicking. This is done by hitting the Esc key and navigating between cell rows using the Up and Down arrow keys. To enter edit mode, hit the Enter key on the keyboard. The new Table Designer preview feature supports creating new tables and editing existing tables on a connected SQL Server instance. This is a highly requested product enhancement and enables more productive schema management with a modern, streamlined UX.

Haha! It only took several years but my hectoring finally pays off. Now for the full set of Jupyter keyboard shortcuts…

Comments closed

On-Premises Scale-Out Post-Big Data Clusters

Published 2022-03-01 by Kevin Feasel

Chris Adkin looks at alternatives to SQL Server 2019 Big Data Clusters:

This post assumes that for reasons relating to data sovereignty, fiduciary or regulatory reasons in general that the:

– analytics platform will be underpinned by something which is cloud and on premises infrastructure agnostic, Kubernetes in other words.

– focal points of the Data Lake processing element will be Python and open source tools

– SQL Server 2022 S3 object virtualisation is the preferred technology for querying the Data Lake via a T-SQL surface area

– S3 is the preferred technology for storing the data in our Data Lake.

Read on for the high-level solution and stay tuned for more detailed answers.

Comments closed

Zero Records but Lots of Space Used

Published 2022-03-01 by Kevin Feasel

Jeff Iannucci solves a riddle:

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.

Click through to see how. My initial thought was LOB craziness but Jeff’s example doesn’t even need that.

Comments closed

Deleting an RDS Instance

Published 2022-03-01 by Kevin Feasel

Chad Callihan takes out the trash:

We’ve created an AWS RDS instance and logged into it successfully. One thing to remember when creating test instances is when to them when you’re finished. While a lot of test instances I’ve created have been free tier, it’s still good to clean up rather than leave instances lingering. Today, let’s clean up a test instance.

Click through for the step-by-step on how to do this.

Comments closed

Choosing a Cost Threshold for Parallelism

Published 2022-03-01 by Kevin Feasel

Andrea Allred doesn’t want to do things by the numbers:

Cost Threshold for Parallelism (CTfP) is one of my favorite server level settings in SQL Server. I remember the first time I heard this setting mentioned by Grant Fritchey. I quickly hopped on my servers and found them all set at the default (5) and adjusted them to 50 for the non SSRS servers and 30 for the SSRS ones. That was many years ago, but I had kept those numbers in my head because I didn’t know a better way.

Read on for a better way.

Comments closed

All about Boxplots

Published 2022-02-28 by Kevin Feasel

Amy Esselman explains what a boxplot is:

The “box” part of a boxplot outlines the lower and upper quartiles. Inside the box is a line that indicates the median value. There are lines that extend outside the box—known as the whiskers—to depict the range of values in a given dataset. If there are outliers, then individual dots in line with the whiskers are plotted to denote the extreme values. 

Click through for a depiction of the plot as well as several alternative depictions which can include more information at the cost of added complexity.

Comments closed

Not Optimizing for Ad Hoc Workloads

Published 2022-02-28 by Kevin Feasel

Erik Darling continues a thread:

A few weeks back, my friend Randolph (B|T) and I collaborated a bit on a blog post about Optimize For Ad Hoc Workloads.

Now that I’m a Microsoft Approved Blogger™️ and you all have to take me Very Seriously™️, I’d like to make a few of the points here in my own words, though I highly suggest reading Randolph’s post because it’s much better.

Randolph writes for a living. I’m just a consultant with some free time.

Click through for Erik’s thoughts. Before reading Randolph and Erik’s posts, my figuring on it was that it didn’t hurt and could help, so “on” was a good default. These posts lay out a good reason why the former isn’t true and the latter is less likely than it seems.

Comments closed

Creating an SSIS Integration Runtime in Synapse

Published 2022-02-28 by Kevin Feasel

Andy Leonard shows one way to create an Azure * SQL Server Integration Services integration runtime for Azure Synapse Analytics:

On 17 Feb 2022, I first saw the Microsoft announcement of the public preview of Azure-SSIS integration runtimes in Azure Synapse Analytics. I blogged about the announcement in a post titled Azure-SSIS Integration Runtime now available in Azure Synapse Analytics.

I am excited to share one way for you to provision an Azure-SSIS IR in Synapse Analytics, following these steps. To start provisioning a shiny new Azure Synapse Analytics Azure-SSIS integration runtime, open Synapse Studio:

Read on for the step-by-step guide.

Comments closed