Sizing your Azure SQL Database

Do you want to identify the correct Service Tier and Compute Size ( was once known as performance level) for your Azure SQL Database? How would you go about it? Would you use the DTU (Database Transaction Unit) calculator? What about the new pricing model vCore? How would you translate you current on-premises workload to the cloud?

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Azure SQL Data Warehouse Query Store

I personally think that query store has been a fantastic feature. I find myself using it for query performance troubleshooting (plan regressions is a big one). This has always been available since SQL Server 2016 and even Azure SQL Database but now Microsoft have made it available for Azure SQL Data Warehouse (DW).

If you connect to the Azure SQL DW via SQL Server Management Studio (SSMS) there is no Query Store Node (for the version, I was checking 17.9.1). I was even wondering if it was on by default?

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Azure SQL Database Online Columnstore Unicorn and Rainbow Theory

As Microsoft states “online clustered columnstore index build enables you to optimize and compress your data with minimal downtime without major blocking operations on the queries that are executing while you are transforming the data.”

Based on one of my favourite blog posts ever about unicorns, rainbows and online index operations (https://www.sqlskills.com/blogs/paul/a-sql-server-dba-myth-a-day-830-unicorns-rainbows-and-online-index-operations/) I wanted to show that using a command such as

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Azure SQL Database and Transaction Log

Checking out the transaction log in Azure SQL Database. If you are curious like me, you will want to know about what your transaction log is doing in the cloud. The following queries have been tested and run okay within Azure SQL Database it gives you some great insight. First up, the classic log_reuse_wait_desc. You can’t exactly do much with this output, more so, just to fulfill curiosity.

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Classify your Azure SQL Database

Here I am talking about SQL Data Discovery & Classification feature that is built into Azure SQL Database. With this feature you have the ability to classify your database, which is what I will do today. There are 2 attributes to classification which are important components. These are labels and information types. Labels are used to define the sensitivity level of the data stored in the column and information types being the type of data stored in the column.

To start this process, you need to navigate to the security section of your SQL Database, it is actually within Advanced Threat Protection.

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Azure SQL Database and Transaction Log

Checking out the transaction log in Azure SQL Database. If you are curious like me, you will want to know about what your transaction log is doing in the cloud. The following queries have been tested and run okay within Azure SQL Database. It gives you some great insight.

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Azure SQL Database – Reduce the workload before initiating another service objective update

Getting straight to the point, I initiated a very common task recently, another scale up request. However, a new message popped up. “The service objective assignment for database on server could not be completed as the database is too busy. Reduce the workload before initiating another service objective update”.

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Moving off SQL Server 2008 / R2 – What can Azure offer?

You will very likely know that SQL Server 2008 / R2 end of support is on July 9th 2019. Not that long to start thinking about and assessing your options. For this post I just want to discuss couple of things that you can do and I specifically mention Azure technologies, think of this as a high level starter guide.

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Azure SQL DB VS SQL Server For the DBA

Being the start of the new year and with new projects most likely starting again I would like to share with you an article I wrote a while back, but still quite relevant.

Hopefully you find it useful for those wanting to know key differences between Azure SQL Database and a locally installed SQL Server from a DBA perspective and whether or not these key differences can be seen as advantages or disadvantages.

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