August 20, 2014

Why do we care about MySQL Performance at High Concurrency?

In many MySQL Benchmarks we can see performance compared with rather high level of concurrency. In some cases reaching 4,000 or more concurrent threads which hammer databases as quickly as possible resulting in hundreds or even thousands concurrently active queries. The question is how common is it in production ? The typical metrics to use […]

Impact of memory allocators on MySQL performance

MySQL server intensively uses dynamic memory allocation so a good choice of memory allocator is quite important for the proper utilization of CPU/RAM resources. Efficient memory allocator should help to improve scalability, increase throughput and keep memory footprint under the control. In this post I’m going to check impact of several memory allocators on the […]

Webinar “How to Turbocharge Your MySQL Performance Using Flash Storage”

Next Wednesday, March-21, 11:00am Pacific Time, Baron and me will be co-presenting with Virident webinar: “How to Turbocharge Your MySQL Performance Using Flash Storage” (From Virident side: Shridar Subramanian and Shirish Jamthe).

Black-Box MySQL Performance Analysis with TCP Traffic

For about the past year I’ve been formulating a series of tools and practices that can provide deep insight into system performance simply by looking at TCP packet headers, and when they arrive and depart from a system. This works for MySQL as well as a lot of other types of systems, because it doesn’t […]

Side load may massively impact your MySQL Performance

When we’re looking at benchmarks we typically run some stable workload and we run it in isolation – nothing else is happening on the system. This is not however how things happen in real world when we have significant variance in the load and many things can be happening concurrently. It is very typical to […]

MySQL performance on EC2/EBS versus RDS

A while ago I started a series of posts showing benchmark results on Amazon EC2 servers with RAID’ed EBS volumes and MySQL, versus RDS machines. For reasons that won’t add anything to this discussion, I got sidetracked, and then time passed, and I no longer think it’s a good idea to publish those blog posts […]

Diagnosing and fixing MySQL Performance Problems in Russian in Moscow, Russia

During my visit to Moscow, Russia next month I’m going to give a full day training/tutorial presentation on Diagnosing and Fixing MySQL Performance Problems . This even will be based on updated and expanded tutorial from MySQL Conference & Expo which was so popular it was sold out earlier this year. This also will be […]

Why Swapping is bad for MySQL Performance ?

So you get MySQL or other applications using too much memory on the box or OS behaving funny and using more memory for cache and pushing application to the swap. This causes swapping and causes performance problems. This much is obvious. But how bad is it ? Should you count it same as normal Disk […]

MySQL Performance Blog was down today

MySQL Performance Blog (and percona.com too) were down today because the switch in our rack died completely. It took a while to fix it using secondary switch we had. Provider was not willing to do it as remote hands so I had to drive to the data center to fix it. We got number of […]

How Percona does a MySQL Performance Audit

Our customers or prospective customers often ask us how we do a performance audit (it’s our most popular service). I thought I should write a blog post that will both answer their question, so I can just reply “read all about it at this URL” and share our methodology with readers a little bit. This […]