As MySQL database administrators, we are well aware of the significance of implementing a primary key within a table. Throughout our careers, most of us have encountered situations where the absence of a primary key has led to operational challenges. Primary keys play an indispensable role in sound database design by uniquely identifying individual rows and significantly enhancing data retrieval, manipulation, and overall system performance.

From the MySQL documentation:

The PRIMARY KEY clause is a critical factor affecting the performance of MySQL queries and the space usage for tables and indexes. The primary key uniquely identifies a row in a table. Every row in the table should have a primary key value, and no two rows can have the same primary key value.

It is common for tables to be inadvertently created without a primary key, often leading to regrettable consequences that we only recognize when issues …

ProxySQL is a high-performance SQL proxy, which runs as a daemon watched by a monitoring process. The process monitors the daemon and restarts it in case of a crash to minimize downtime.

The daemon accepts incoming traffic from MySQL clients and forwards it to backend MySQL servers.

The proxy is designed to run continuously without needing to be restarted. Most configurations can be done at runtime using queries similar to SQL statements in the ProxySQL admin interface. These include runtime parameters, server grouping, and traffic-related settings.

Here, we will consider ProxySQL configured for async replication. Even when a replica is broken/stopped, ProxySQL still routes connections to replicas. It can be overcome by setting the appropriate value for mysql-monitor_slave_lag_when_null

…

Do you know what lies inside your MySQL Data Directory? This article is a quick guide about the files stored inside MySQL data directory. Data managed by the MySQL server…

The post Quick Look – MySQL Data Directory Files first appeared on Change Is Inevitable.

During a migration to MySQL HeatWave, it could be interesting to cut & paste user creation statements. In this blog you learn how to achieve this.

Another packed full newsletter coming your way this week in OpenLampTech. So much goodness in this one. Take your time reading, enjoy, and share. Thank you.

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Sometimes it’s convenient to retrieve the user creation statement and to copy it to another server.

However, with the new authentication method used as default since MySQL 8.0, caching_sha2_password, this can become a nightmare as the output is binary and some bytes can be hidden or decoded differently depending of the terminal and font used.

Let’s have a look:

If we cut the create user statement and paste it into another server what will happen ?

We can see that we get the following error:

ERROR: 1827 (HY000): The password hash doesn't have the expected format.

How could we deal with that ?

The solution to be able to cut & paste the authentication string without having any issue, is to change it as a binary representation (hexadecimal) like this:

And then replace the value in the user create statement:

But there is an easier way. …

Here comes the success story of Specialized Media Dashboard, a project that comprises an open-source media monitoring system. The specialized media in question encompasses the spheres of journalism, law enforcement, and climate change.

The post Case Study: How the Engineers of SMD Found a Way to Process Millions of Database Records Faster With dbForge Studio for MySQL appeared first on Devart Blog.

Find the official MySQL container image in the Oracle Container Registry

If you are deploying MySQL on containers, one of the first tasks is to find the right image.

There’s a certain amount of confusion, especially when we’re trying to help someone who’s having problems with their deployment.

For example, when people say I’m using the official docker image… what does that really mean?

Docker Hub, provides their official image (https://hub.docker.com/_/mysql), but this is not the official MySQL image that we, the MySQL Team at Oracle, support.

Before the mess with Docker Hub ([1], [2], [3]), the real official images for MySQL …

By integrating MySQL database migrations into your testing process, you can not only ensure your testing database is up to date with the most recent changes, but you can also test that the migrations themselves are performing as expected. In this post we will walk you though how to incorporate migrations with Knex and run those migrations on your test database being run in Testcontainers.