Sysbench has long been established as the de facto standard when it comes to benchmarking MySQL performance. Percona relies on it daily, and even Oracle uses it when blogging about new features in MySQL 8. Sysbench comes with several pre-defined benchmarking tests. These tests are written in an easy-to-understand scripting language called Lua. Some […]
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MySQL 8.0.15 performs worse in sysbench oltp_read_write than MySQL 5.7.25
Initially I was testing group replication performance and was puzzled why MySQL 8.0.15 performs consistently worse than MySQL 5.7.25.
It appears that a single server instance is affected by a performance degradation.
My testing setup
Hardware details:
Bare metal server provided by packet.net, instance size: c2.medium.x86
24 Physical Cores @ […]
In this article I’m going to talk about partial and sparse indexes in MongoDB® and Percona Server for MongoDB®. I’ll show you how to use them, and look at cases where they can be helpful. Prior to discussing these indexes in MongoDB in detail, though, let’s talk about an issue on a relational database like […]
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Over the last year, I have been pursuing a part time hobby project exploring ways to squeeze as much data as possible in MySQL. As you will see, there are quite a few different ways. Of course things like compression ratio matters a lot but, other items like performance of inserts, selects and updates, […]
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Out of the box, the default PostgreSQL configuration is not tuned for any particular workload. Default values are set to ensure that PostgreSQL runs everywhere, with the least resources it can consume and so that it doesn’t cause any vulnerabilities. It has default settings for all of the database parameters. It is primarily the […]
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For optimum performance, a PostgreSQL database depends on the operating system parameters being defined correctly. Poorly configured OS kernel parameters can cause degradation in database server performance. Therefore, it is imperative that these parameters are configured according to the database server and its workload. In this post, we will discuss some important Linux kernel […]
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The main focus of a previous blog post was the performance of MyRocks when using fast SSD devices. However, I figured that MyRocks would be beneficial for use in cloud workloads, where storage is either slow or expensive.
In that earlier post, we demonstrated the benefits of MyRocks, especially for heavy IO workloads. Meanwhile, Mark wrote in […]
Recently, Dimitri published the results of measuring MySQL 8.0 on Intel Optane storage device. In this blog post, I wanted to look at this in more detail and explore the performance of MySQL 8, MySQL 5.7 and Percona Server for MySQL using a similar set up. The Intel Optane is a very capable device, so […]
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MySQL stored procedures, functions and triggers, are tempting constructs for application developers. However, as I discovered, there can be an impact on database performance when using MySQL stored routines. Not being entirely sure of what I was seeing during a customer visit, I set out to create some simple tests to measure the impact […]
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Ever since AMD released their EPYC CPU for servers I wanted to test it, but I did not have the opportunity until recently, when Packet.net started offering bare metal servers for a reasonable price. So I started a couple of instances to test Percona Server for MySQL under this CPU. In this benchmark, I discovered […]
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