A couple of days ago I was creating an index on the source and when I checked the replica side it was not replicated, so I just wanted to explain how the replication filter may increase the complexity of your DBA operations.

Replication occurs by reading events from the binary log of the source and then executing them on the replica. The events in the binary log are recorded in different formats, depending on the type of event. These formats are determined by the binary logging format used when the events were initially recorded on the source. The relationship between the binary logging formats and the terminology used during replication is as follows:

When using statement-based binary logging, the source writes SQL statements to the binary log. Replication of the source to the replica is performed by executing these SQL statements on the replica. This is known as statement-based replication (SBR), and it …

We had a couple of cases where clients reported that the MySQL error log was flooded with the below note:

2023-01-18T13:07:56.946323Z 2 [Note] InnoDB: Stopping purge
2023-01-18T13:07:56.948621Z 2 [Note] InnoDB: Resuming purge
2023-01-18T13:08:27.229703Z 2 [Note] InnoDB: Stopping purge
2023-01-18T13:08:27.231552Z 2 [Note] InnoDB: Resuming purge
2023-01-18T13:08:28.581674Z 2 [Note] InnoDB: Stopping purge

One of my colleagues Sami Ahlroos found that whenever we trigger a truncate on any table, the function is stopping the purge and then resuming it once it has found it stopped.

Below are the steps to reproduce.

1. Log verbosity needs to be set to 3 (the default value)

mysql> show variables like 'log_error_verbosity%';
+---------------------+-------+
| Variable_name       | Value |
+---------------------+-------+
| …

In this article, we are going to talk about the MySQL SUBSTRING() function with its variations. Here, you will find a detailed guide with the basic syntax and examples of how to use this function. Moreover, we will demonstrate the benefits of MySQL coding in a handy IDE - dbForge Studio for MySQL that can help you save a lot of time and energy.

The post Substring in MySQL – Syntax and Examples appeared first on Devart Blog.

Welcome back to this week’s OpenLampTech developer newsletter. I appreciate your interest and reading. Thank you! Get ready for more PHP, MySQL, and LAMP stack content.

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In OpenLampTech issue #62, we have content covering:

• WordPress certification
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Your continued support for the OpenLampTech publication means so much. Show your support with a …

On a busy MySQL server, some key metrics that should be actively monitored include:

As you know, before FOSDEM, the MySQL Community Team organizes a 2 days conference in Brussels. During these preFOSDEM MySQL Days, attendees will have the opportunity to learn more about their favorite database from Oracle’s MySQL teams and selected professionals from the MySQL community. This popular event is organized for and with the MySQL Community. […]

Just before FOSDEM, the MySQL Team is organizing a 2 days conferences for and with the MySQL Community. Here is the agenda.

How can we fix a nasty out-of-space issue leveraging the flexibility of Percona Operator for MySQL?

When planning a database deployment, one of the most challenging factors to consider is the amount of space we need to dedicate to data on disk.

This is even more cumbersome when working on bare metal, as it is more difficult to add space when using this kind of solution with respect to the cloud.

When using cloud storage like EBS or similar, it is normally easy(er) to extend volumes, which gives us the luxury to plan the space to allocate for data with a good grade of relaxation. 

Is this also true when using a solution based on Kubernetes like Percona Operator for MySQL? Well, it depends on where you run it. However, if the platform you choose supports the option to extend volumes, K8s per se gives you the …

Our pleasure to announce a list of conferences where you can find MySQL at from January to May 2023. Please find the list below and make an appointments in your calendars: We are looking forward seeing you in person at the physical shows as well as you are more than welcome to come and listen […]

List of conferences with MySQL during January-May 2023