In my first post on the MySQL 8.4 Audit Log Filter component, I covered how to install the component and configure a basic filter that captures all events. The Audit Log Filter framework offers a highly granular and configurable auditing mechanism, enabling administrators to log specific events based on criteria such as user, host, or event type. This selective approach enhances observability, supports compliance initiatives, and minimizes unnecessary logging overhead.

In this follow-up, we’ll take a deeper technical look at defining and optimizing audit log filters to capture only the most relevant database activities—delivering actionable audit data while significantly reducing noise and log volume.

Example 1

Audit all events:

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SELECT audit_log_filter_set_filter('log_all_events', …

The audit log filter component in MySQL 8.4 provides administrators with a powerful mechanism for auditing database activity at a fine-grained level. While it offers significant flexibility—such as selectively logging events based on users, hosts, or event types—it can also be challenging to understand and configure correctly.

In this article, we will examine how the audit log filter component works, walk through its core concepts, and share practical tips for configuring and managing audit filters effectively. Our goal is to help you leverage this feature to improve observability, meet compliance requirements, and reduce unnecessary logging overhead.

Enabling Audit Log Filter

We will be using Percona Server 8.4.4 or higher in the examples below. First, we need to enable the audit log filter component. To install the audit log filter component, we need to run the following command:

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We saw in the previous post how we can deal with data stored in the new VECTOR datatype that was released with MySQL 9.0. We implemented the 4 basic mathematical operations between two vectors. To do so we created JavaScript functions. MySQL JavaScript functions are available in MySQL HeatWave and MySQL Enterprise Edition (you can […]

After discussing with Simon about some issues when trying to recompile MySQL 8.0.34 on CentOS 9 (see #111159), I also tried it and indeed some dependencies are not listed when compiling via the source RPM.

Let’s see how to recompile the two latest versions of MySQL (8.0.34 and 8.1.0) using the source RPMs.

I use Oracle Linux 9 as build machine.

Getting the source RPM

To get the source RPM, you need first to install the MySQL Community’s repo:

$ sudo dnf install …

More and more people are using UUID’s to identify records in their database.

As you already know, for MySQL’s storage engine (InnoDB) the primary key is very important ! (for performance, memory and disk space).

See the following links:

• https://lefred.be/content/mysql-invisible-column-part-ii/
• https://dev.mysql.com/doc/refman/8.0/en/create-table-gipks.html (GIPK mode in MySQL 8.0.30 !)

Problems

There are 2 major problems having a UUID as Primary Key in InnoDB:

1. generally they are random and cause clustered index to be rebalanced
2. they are included in each secondary indexes (consuming disk and memory)

Let’s have a look at …

This post is the final one of a series of articles on extending MySQL with the Component Infrastructure:

• Extending MySQL using the Component Infrastructure – part 1
• Extending MySQL using the Component Infrastructure – part 2: building the server
• Extending MySQL using the Component Infrastructure – part 3: component services
• Extending MySQL using the …

This post is the twelfth one of a series of articles on extending MySQL with the Component Infrastructure:

• Extending MySQL using the Component Infrastructure – part 1
• Extending MySQL using the Component Infrastructure – part 2: building the server
• Extending MySQL using the Component Infrastructure – part 3: component services
• Extending MySQL using the …

This post is the eleven one of a series of articles on extending MySQL with the Component Infrastructure, the list above will be updated as new articles are published:

• Extending MySQL using the Component Infrastructure – part 1
• Extending MySQL using the Component Infrastructure – part 2: building the server
• Extending MySQL using the Component Infrastructure – part 3: component services
• …

Today we are already at the post number ten of the series of articles related to extending MySQL with the Component Infrastructure, the list above will be updated as new articles are published:

• Extending MySQL using the Component Infrastructure – part 1
• Extending MySQL using the Component Infrastructure – part 2: building the server
• Extending MySQL using the Component Infrastructure – part 3: component services
• …