Author - Sveta Smirnova

MariaDB Track at Percona Live

MariaDB track at Percona Live 2019

Less than one month left until Percona Live. This time the Committee work was a bit unusual. Instead of having one big committee for the whole conference we had a few mini-committees, each responsible for a track. Each independent mini-committee, in turn, had a leader who was responsible for the whole process. I led […]

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MySQL Memory Management, Memory Allocators and Operating System

memory management mysql bug

When users experience memory usage issues with any software, including MySQL®, their first response is to think that it’s a symptom of a memory leak. As this story will show, this is not always the case.
This story is about a bug.
All Percona Support customers are eligible for bug fixes, but their options vary. For […]

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Watch Webinar: Billion Goods in Few Categories – How Histograms Save a Life?

Webinar: Billion Goods in Few Categories: How Histograms Save a Life?

Please join Percona’s Principal Support Engineer Sveta Smirnova as she presents Billion Goods in Few Categories: How Histograms Save a Life?
Watch the Recorded Webinar
We store data with the intention to use it: search, retrieve, group, sort, etc. To perform these actions effectively, MySQL storage engines index data and communicate statistics with the Optimizer when […]

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Upcoming Webinar Thurs 3/21: MySQL Performance Schema in 1 hour

MySQL Performance Schema in 1 hour

Please join Percona’s Principal Support Engineer, Sveta Smirnova, as she presents MySQL Performance Schema in 1 hour on Thursday, March 21st, 2019, at 10:00 am PDT (UTC-7) / 1:00 pm EDT (UTC-4).
Register Now
MySQL 8.0 Performance Schema is a mature tool, used by humans and monitoring products. It was born in 2010 as “a feature […]

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MySQL Ripple: The First Impression of a MySQL Binlog Server

MySQL Ripple

Just about a month ago, Pavel Ivanov released Ripple under the Apache-2.0 license. Ripple is a MySQL binlog server: software which receives binary logs from MySQL or MariaDB servers and delivers them to another MySQL or MariaDB server. Practically ,this is an intermediary master which does not store any data, except the binary logs […]

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Why Optimization derived_merge can Break Your Queries

MySQL optimizer bugs

Lately, I worked on several queries which started returning wrong results after upgrading MySQL Server to version 5.7 The reason for the failure was derived merge optimization which is one of the default
optimizer_switch  options. Issues were solved, though at the price of performance, when we turned it
OFF . But, more importantly, we could […]

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Webinar 6/27: MySQL Troubleshooting Best Practices: Monitoring the Production Database Without Killing Performance

performance troubleshooting MySQL monitoring tools

Please join Percona’s Principal Support Escalation Specialist Sveta Smirnova as she presents Troubleshooting Best Practices: Monitoring the Production Database Without Killing Performance on Wednesday, June 27th at 11:00 AM PDT (UTC-7) / 2:00 PM EDT (UTC-4).
Register Now
 
During the MySQL Troubleshooting webinar series, I covered many monitoring and logging tools such as:

General, slow, audit, binary, error […]

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Call for Questions: Webinar with MySQL Benchmarking Experts

benchmarking request

If you attended my latest Troubleshooting MySQL Concurrency Issues with Load Testing Tools webinar you learned how I exploit benchmarking tools to replicate locking issues and crashes. But I told you nothing about proper use of these tools: for reliable benchmarks. I did not tell you that for a reason… I am just a […]

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Troubleshooting MySQL Concurrency Issues with Load Testing Tools Webinar: Q & A

MySQL Troubleshooting

In this blog, I will provide answers to the Q & A for the Troubleshooting MySQL Concurrency Issues with Load Testing Tools webinar.
First, I want to thank everybody for attending my May 23, 2018, webinar on troubleshooting tools for MySQL. The recording and slides for the webinar are available here. Below is the list […]

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MySQL Test Framework for Percona XtraDB Cluster

MySQL Test Framework

At my latest webinar “MySQL Test Framework (MTR) for Troubleshooting”, I received an interesting question about MTR test cases for Percona XtraDB Cluster (PXC). Particularly about testing SST and IST.
This post is intended to answer this question. It assumes you are familiar with MTR and can write tests for MySQL servers. If you are […]

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