ProxySQL 1.4.13, released by ProxySQL, is now available for download in the Percona Repository along with an updated version of Percona’s proxysql-admin tool.

ProxySQL is a high-performance proxy, currently for MySQL and its forks (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.

The ProxySQL 1.4.13 source and binary packages available at https://percona.com/downloads/proxysql …

It seems, that this is a question that regularly shows up in forums or stackoverflow.

To start, let’s highlight the fact that in MySQL 8.0 it’s not any more possible to create a user directly from the GRANT command (ERROR 1410 (42000): You are not allowed to create a user with GRANT).

This means that to grant some privileges, the user must be created first.

Let’s create a user ‘user1‘ with ‘ChangeMe‘ as password that the user will have to change:

mysql> create user 'user1' identified by 'ChangeMe' password expire;
Query OK, 0 rows affected (1.35 sec)

Let’s try to connect to MySQL using that new created user:

$ mysql -u …

I am getting ready to hit the road for the first time in 2019.  And the first stop is Belgium.

PHP Benelux is the first stop January 25 & 26, 2019 in Antwerp.  This is my firs time to this show but I have heard others rave about it for years and I am looking for to this show.

Next is an event on February 1st that is quickly filling up. The Pre-FOSDEM MySQL Day   Come hear session from the MySQL Engineering Teams, some other great technical speakers, and talk to them!  Great event but please reserve your space ASAP as this is a very popular event!
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Percona announces the release of Percona Toolkit 3.0.13 for January 9, 2019.

Percona Toolkit is a collection of advanced open source command-line tools, developed and used by the Percona technical staff, that are engineered to perform a variety of MySQL®, MongoDB® and system tasks that are too difficult or complex to perform manually. With over 1,000,000 downloads, Percona Toolkit supports Percona Server for MySQL, MySQL®, MariaDB®, Percona Server for MongoDB and MongoDB.

Percona Toolkit, like all Percona software, is free and open source. You can download packages  …

In less than a month, on February 2–3, the largest open source conference in Europe, FOSDEM, will take place in Brussels. The MySQL Engineering Team will of course attend and present. Here’s a short overview of our sessions. If you want to talk to us about something, or if you just want to listen and learn, this is where you’ll find us:

Friday

On February 1, the day before FOSDEM, we make an early start with a Pre-FOSDEM MySQL Day.…

One of the most exciting features Amazon Aurora Serverless brings to the table is its ability to go to sleep (pause) when idle. This is a fantastic feature for development and test environments. You get access to a powerful database to run tests quickly, but it goes easy on your wallet as you only pay for storage when the instance is paused.

You can configure Amazon RDS Aurora Serverless to go to sleep after a specified period of time. This can be set to anywhere between five minutes and 24 hours

For this feature to work, however, inactivity has to be complete. If you have so much as a single query or even maintain an idle open connection, Amazon Aurora Serverless will not be able to pause.

This means, for example, that pretty much any monitoring you may have enabled, including our own …

Percona Live Open Source Database Conference 2019 in North America has moved to Austin, Texas: a cool place to be, and host to many big names in the tech space. Read what Dave Stokes, MySQL Community Manager for Oracle, has to say in favor of Austin.

If you need a conference ticket for Austin, put in your proposal now!

Those who are successful with their presentation or tutorial submissions will receive a pass to the full three days of the event. Closing date for the call for papers is Sunday, January 20.

Percona is adopting an industry trend by organizing the conference into 13 separate tracks …

In Part I, we introduced a High Availability (HA) framework for MySQL hosting and discussed various components and their functionality. Now in Part II, we will discuss the details of MySQL semisynchronous replication and the related configuration settings that help us ensure redundancy and consistency of the data in our HA setup. Make sure to check back in for Part III where we will review various failure scenarios that could arise and the way the framework responds and recovers from these conditions.

What is MySQL Semisynchronous Replication?

Simply put, in a …

A few days ago, I stepped into a trap !  This made me lose time for fixing things (and even more for writing this post...).  In the hope that you will avoid my mistake, I am sharing this war story.  I also obviously opened a bug, more about this below.

TL&DR: be careful when using CHANGE MASTER TO MASTER_DELAY = N: it might wipe your relay logs !

As written in the TL&DR, running CHANGE MASTER 

We know that MySQL query cache is deprecated as of MySQL 5.7.20 and removed in MySQL 8.0 and It has been recommended to use ProxySQL (or other) external query cache instead.

In this blog post, we’ll present the ProxySQL query cache functionality and how does it help us.

How to setup ProxySQL between client and database servers is out of the scope of this article.

If you are looking for other articles on ProxySQL Series :

• MySQL replication Read-Write Split up
• Replication Switchover using Proxysql And …