ProxySQL Technology Day in Ghent, Belgium

As a part of the ProxySQL team I am happy to announce my trip to Ghent to ProxySQL Technology Day. With great pleasure, I will join the experts from Oracle, Percona, and Pythian to talk about various things that ProxySQL can do for a user. We are going to meet at 5PM at Ghent’s Co.Station co-working on Thursday, October 3rd to walk through key features that ProxySQL is adding to MySQL ecosystem. Join me and others for five talks and a round table about building MySQL infrastructure to serve hundreds of thousands of queries per second.

What am I going to talk about?

In my 30 minutes “Introduction to High …

Do you think Quality Assurance (QA) is more than the simplistic view of bug hunting? Do you believe that QA is important to the entire software development lifecycle and want to focus on failure testing, process and performance control, as well as best practice adoption? Do you enjoy doing performance benchmarks and noticing regressions? Do you like to write about it, from internal reports to external blog posts?

Then why not take up a challenge at Codership, the makers of Galera Cluster, as we are looking for a Galera Cluster QA Engineer (job description at link).

We’re looking for someone who is able to work remotely, join a company meeting at least once per year, be comfortable with the use of Slack and email (asynchronous communication, for developing our virtually synchronous replication solution!), but most importantly enjoy testing the …

Author: Robert Agar

The role of a corporate database administrator has evolved tremendously since the introduction of relational databases in the late 1970s. A DBA from the early 1980s would be totally unprepared for the complexities that face database professionals in 2019. It’s a completely different world and the skillset required has radically changed.

The heightened focus on the value of a company’s accumulated data has made DBAs more important to the business goals of an organization than ever before. Keeping this valuable resource safe and accessible is one of the modern DBA’s primary responsibilities. Many diverse methods are required to fulfill these duties, and a DBA must be comfortable using them all to address problems encountered in day-to-day activities.

Common Issues Faced by DBAs

The laundry list of issues that DBAs must deal with regularly is a long one. …

Overview The Skinny

Part of the power of Tungsten Clustering for MySQL / MariaDB is the ability to perform true zero-downtime maintenance, allowing client applications full access to the database layer, while taking out individual nodes for maintenance and upgrades. In this blog post we cover various types of maintenance scenarios, the best practices associated with each type of action, and the key steps to ensure the highest availability.

Important Questions Understand the Environment as a Whole First

There are a number of questions to ask when planning cluster maintenance that are critical to understand before starting.

For example:

1. What is the cluster topology?
   • Standalone (connectors write to single cluster master)
     Single cluster: …

Up to now, the way of updating dbdeployer was the same as installing it for the first time, i.e. looking at the releases page, downloading the binaries for your operating system, unpacking it and finally replacing the existing binaries.

This is not the procedure I follow, however, as for me updating means just compile the latest version I have just finished coding. For this reason, when Simon Mudd mentioned to me that dbdeployer should update itself over the Internet, I didn’t immediately grasp the concept. But then …

This title may be suitable for the new age MySQL Users. Because in 5.7 onwards its already supported to enable GTID online. But still few of my mission critical databases are in 5.6 and handling 70k QPS. So I know enabling GTID needs downtime for this. But in my case, the GTID has been already implemented. But still the replication is using Binlog file name and position for replicating the data.

This is my slave status. You can see the GTID has been enabled but the Auto_Position is still 0 which means still my replication is binlog filename and position. No issues with the replication. But the MySQL world already moved to GTID for better control on replication and Failover.

             Master_Server_Id: 10010
                  Master_UUID: c924545b-a3e3-11e8-8a39-42010a280410
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL …

Earlier I wrote about check constraints when MySQL 8.0.16 was released. But this week I noticed two different folks having similar problems with them. And sadly it is 'pilot error'.

The first was labeled  MYSQL 8.0.17 CHECK not working even though it has been implemented and a cursory glance may make one wonder what is going on with the database.

The table is set up with two constraints. And old timers will probably mutter something under their breath about using ENUMs but here they are:

 JOB_TITLE varchar(20) CHECK(JOB_TITLE IN ('Lecturer', 'Professor', 'Asst. Professor', 'Sr. Lecturer')),  

…

Percona announces the release of Percona Server for MySQL 5.7.27-30 on August 22, 2019 (downloads are available here and from the Percona Software Repositories). This release merges changes of MySQL 5.7.27, including all the bug fixes in it. Percona Server for MySQL 5.7.27-30 is now the current GA release in the 5.7 series. All of Percona’s software is open-source and free.

Bug Fixes:

• Parallel doublewrite buffer writes must crash the server on an I/O error occurs. Bug fixed …

Author: Robert Agar

The monitoring of IT systems is an important practice that should be in place in any complex computing environment. It provides a window into the inner-workings of the systems and applications with which a business or organization operates. The statistics produced by a monitoring platform can be used to optimize systems, enhance the user experience or plan for capacity upgrades.

A viable monitoring platform is designed with the ability to generate and send alerts. This feature increases the utility of the tool by introducing the possibility of creating immediate notifications to address potential issues or inconsistencies in the systems being observed. Alerts are routed to individuals or teams who can take action to further investigate or resolve the problems. Let’s take a closer look at why you want alerts to be created and how your organization should handle them.

Why …

ProxySQL 2.0.6, released by ProxySQL, is now available for download in the Percona Repository along with Percona’s proxysql-admin tool.

ProxySQL is a high-performance proxy, currently for MySQL and database servers in the MySQL ecosystem (like Percona Server for MySQL and MariaDB). It acts as an intermediary for client requests seeking resources from the database. René Cannaò created ProxySQL for DBAs as a means of solving complex replication topology issues.

This release includes ProxySQL 2.0.6 which introduces many new features and enhancements and also …