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Day: November 17, 2022

Diagnosing Customer Rebalance Time Issues in Kafka

Danica Fine and Nikoleta Verbeck continue a series on Kafka performance troubleshooting:

At the surface, rebalancing seems simple. The number of consumers in the consumer group is changing, so the subscribed topic-partitions must be redistributed, right? Yes, but there’s a bit more going on under the hood and this changes depending on what kind of rebalancing is taking place.

Read on to learn more about how Kafka performs rebalancing and what might affect performance.

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SQL Server 2022: Forcing Optimized Plans

Matthew McGiffen wants you to put yourr wallet and your best plans in the bag:

I’ve been reading Bob Ward’s book “SQL Server 2022 Revealed” and one of the new features in Intelligent Query Processing (IQP) jumped out at me. Not because it’s going to rock my world but rather it reminded me of an idea I had when I first started playing with Query Store when it came out.

I thought it would be cool if the execution plans cached in Query Store could be used to populate the plan cache after an instance restart, removing the need for all queries to be recompiled. I even raised a suggestion on Microsoft Connect for it to be considered as a new feature.

Click through to see what Microsoft came up with along these lines.

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Invoke External REST Endpoints from Azure SQL DB

Rob Farley is impressed:

This internal procedure is new in Azure SQL DB in 2022. I think it presents a significant change to the way we do things in the world of SQL, and makes some other tools a whole lot more useful as well.

sp_invoke_external_rest_endpoint lets me send data to a REST API from within a stored procedure. Invoking an HTTP REST endpoint – as simple as that. And while I know you’re probably thinking, “But I can send data to a REST API from anywhere – why do I need to do it from within a stored procedure?”, I want to describe a few scenarios to you.

I like having the functionality, though would want to control how frequently my teams would use it. The reason is that this potentially makes your database the a domain boundary (when thinking in domain-driven design concepts).

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Query Cost Normalizing

Tibor Karaszi does the math:

There are plenty of articles out there recommending you to up the “cost threshold for parallelism” configuration option. Most of you already know this, if not fire up your favorite search engine and spend a few minutes reading about it.

My aim here is to do a totally non-scientific test if I can translate these fictitious seconds to what they correspond to on a reasonably modern hardware – which is my laptop from 2020.

This is one interesting approach to back into a cost threshold for parallelism.

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Continuous Backup for Cosmos DB

Manvendra Singh wants a backup:

This article will explore Continuous backup and steps to configure it for a new Azure Cosmos DB account or an existing Cosmos DB account. Azure Cosmos DB is a fully managed and highly secure, NoSQL database service on the Azure cloud that is designed for modern-day application development. It automatically runs backup for its databases on separate Azure blob storage at regular intervals without affecting the performance, availability, and provisioned resource units (RUs) to ensure data protection from a data recovery standpoint which can be needed in case of data corruption, deletion, or wrongly data updates.

Click through for the process and some limitations.

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SQL Server 2022 Now Generally Available

Rohan Kumar breaks the news:

Today, we announced the general availability of SQL Server 2022, the most Azure-enabled release of SQL Server yet, with continued innovation across performance, security, and availability. This marks the latest milestone in the more than 30-year history of SQL Server.

Click through for the high-level overview of what’s in SQL Server 2022 and grab a copy to mess around with.

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