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MySQL Quality Assurance: A Vision for the Future by Roel Van de Paar (Final Episode 13)

 | August 13, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

MySQL Quality Assurance

Welcome to the final – but most important – episode in the MySQL QA Series. In it, I present my vision for all MySQL Quality Assurance – for all distributions – worldwide. Episode 13: A Better Approach to all MySQL Regression, Stress & Feature Testing: Random Coverage Testing & SQL Interleaving 1. pquery Review 2. Random […]

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Percona Live Amsterdam Discounted Pricing and Community Dinner!

 | August 12, 2015 |  Posted In: Events and Announcements, Percona Live

The countdown is on for the annual Percona Live Data Performance Conference and Expo in Europe! This year the conference will be taking place in the great city of Amsterdam September 21-23rd. This three day conference will focus on the latest trends, news and best practices in the MySQL, NoSQL and Data in the Cloud markets, while […]

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MySQL QA Episode 12: My server is crashing… Now what? For customers or users experiencing a crash

 | August 11, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

My server is crashing… Now what? This special episode in the MySQL QA Series is for customers or users experiencing a crash. A crash? Cheat sheet: https://goo.gl/rrmB9i Sever install & crash. Note this is as a demonstration: do not action this on a production server! sudo yum install -y http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm sudo yum install -y Percona-Server-client-56 Percona-Server-server-56 sudo service […]

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The MySQL query cache: Worst enemy or best friend?

 | August 7, 2015 |  Posted In: Benchmarks, MySQL

During the last couple of months I have been involved in an unusually high amount of performance audits for e-commerce applications running with Magento. And although the systems were quite different, they also had one thing in common: the MySQL query cache was very useful. That was counter-intuitive for me as I’ve always expected the […]

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PXC – Incremental State transfers in detail

 | August 5, 2015 |  Posted In: MySQL, Percona XtraDB Cluster

IST Basics State transfers in Galera remain a mystery to most people.  Incremental State transfers (as opposed to full State Snapshot transfers) are used under the following conditions: The Joiner node reports Galera a valid Galera GTID to the cluster The Donor node selected contains all the transactions the Joiner needs to catch up to […]

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MySQL QA Episode 11: Valgrind Testing: Pro’s, Con’s, Why and How

 | August 4, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

MySQL QA Episode 11

Today’s episode is all about Valgrind – from the pro’s to the con’s, from the why to the how! This episode will be of interest to anyone who is or wants to work with Valgrind on a regular or semi-regular basis. Pro’s/Why Con’s How Using the latest version sudo [yum/apt-get] install valgrind #OR# sudo [yum/apt-get] remove […]

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Percona XtraBackup 2.2.12 is now available

 | August 3, 2015 |  Posted In: Events and Announcements, MySQL, Percona Software, Percona XtraBackup

Percona is glad to announce the release of Percona XtraBackup 2.2.12 on August 3, 2015. Downloads are available from our download site or Percona Software Repositories. Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered […]

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Checkpoint strikes back

 | August 3, 2015 |  Posted In: MongoDB, MySQL

In my recent benchmarks for MongoDB, we can see that the two engines WiredTiger and TokuMX struggle from periodical drops in throughput, which is clearly related to a checkpoint interval – and therefore I correspond it to a checkpoint activity. The funny thing is that I thought we solved checkpointing issues in InnoDB once and […]

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