In MySQL 8.0 we introduced a totally new design for InnoDB REDO Log management. The main difference was about implementing a lock-free solution for user threads, and use dedicated REDO threads for all background IO write work.

for more details, see an excellent and very detailed article by Pawel : https://dev.mysql.com/blog-archive/mysql-8-0-new-lock-free-scalable-wal-design/

However, over a time we also added an option to let users to switch REDO threads=OFF to enforce REDO log processing efficiency in some particular cases. Unfortunately this feature created a lot of confusions for MySQL users, and many ones interpreted this in different ways, providing different and sometimes opposite advices, etc..

My main advice will be always : test each feature yourself and within your …

Warning! Recently, Jean-François Gagné opened a bug on bug.mysql.com #115517; unfortunately, the bug is now private. However, the bug looks quite serious. We at Percona have performed several tests and opened the issue PS-9306 to investigate the problem. In short, what happens is that if you create a large number of tables, like 10000, the […]

MySQL is the most popular database server used by websites to store their important data. In addition to using phpMyAdmin ...

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MySQL HeatWave 9.0 was released under the banner of artificial intelligence. It includes a VECTOR datatype and can easily process and analyze vast amounts of proprietary unstructured documents in object storage, using HeatWave GenAI and Lakehouse. Oracle Cloud Infrastructure also provides a wonderful GenAI Service, and in this post, we will see how to use […]

MySQL HeatWave 9.0 was released under the banner of artificial intelligence. It includes a VECTOR datatype and can easily process and analyze vast amounts of proprietary unstructured documents in object storage, using HeatWave GenAI and Lakehouse. Oracle Cloud Infrastructure also provides a wonderful GenAI Service, and in this post, we will see how to use […]

For a long time, I’ve been thinking about the possibility of importing a single file with multiple connections. Why? Simply because we have scenarios where we end up importing a big file with a single loader thread. Well, I have good news: since the release of 0.16.3-1, we are able to do it. There are […]

As you can read in my previous post related to MySQL 9 and authentication, the old mysql_native_password plugin has been removed. In that post, I showed an example using PHP 7.2, the default version in OL8. If you are using PHP and you want to use MySQL 9, you must be using a more recent […]

With the latest MySQL Innovation Release, we decided that it was time to remove the remaining weak authentication plugin: mysql_native_password. We previously deprecated it and made it not default loaded in MySQL 8.4 LTS and, now, in 9.0 it’s gone! Reasons Oracle places significant attention on the security of all its products, and MySQL is […]

As you can read in my previous post related to MySQL 9 and authentication, the old mysql_native_password plugin has been removed. In that post, I showed an example using PHP 7.2, the default version in OL8. If you are using PHP and you want to use MySQL 9, you must be using a more recent […]

With the latest MySQL Innovation Release, we decided that it was time to remove the remaining weak authentication plugin: mysql_native_password. We previously deprecated it and made it not default loaded in MySQL 8.4 LTS and, now, in 9.0 it’s gone! Reasons Oracle places significant attention on the security of all its products, and MySQL is […]