Category Archives: MariaDB

MariaDB is a widely used open source database for both OLTP and OLAP workloads. It was born as a MySQL fork, which makes it very competitive for transactional environments at scale. However, MariaDB Corporation chosen to develop features and optimisation that allows MariaDB to compete with Oracle in the analytics market.

At Vettabase we are MariaDB experts, not just MySQL professional with some knowledge of MariaDB. Here we share hints and insights about MariaDB specific features, optimisations and internals.

A summary of MariaDB 10.6

Posted on 7 July 2021 by Federico Razzoli — No Comments ↓

MariaDB 10.6 is now Generally Available! Let’s see what’s new and if it’s worth an upgrade. Continue reading A summary of MariaDB 10.6→

MariaDB Ignored Indexes

Posted on 12 June 2021 by Federico Razzoli — No Comments ↓

Ignored Index are a MariaDB 10.6 feature that allows us to drop an index in production reducing the risks. Continue reading MariaDB Ignored Indexes→

Finding Duplicate Indexes and Unused Indexes in MariaDB/MySQL

Posted on 8 June 2021 by Federico Razzoli — No Comments ↓

Having many indexes in our databases comes with a cost. It is good to periodically eliminate duplicate and unused indexes. Continue reading Finding Duplicate Indexes and Unused Indexes in MariaDB/MySQL→

The risks of replication filters in MariaDB and MySQL

Posted on 23 April 2021 by Federico Razzoli — No Comments ↓

MariaDB/MySQL replication filters may be useful, but they come with some risks that Database Administrators should be aware of. Continue reading The risks of replication filters in MariaDB and MySQL→

Sizing Aria Pagecache

Posted on 18 February 2021 by Federico Razzoli — No Comments ↓

Aria pagecache is used to cache frequently read index blocks, reducing the accesses to disks. Let’s see how to check if its size is adequate. Continue reading Sizing Aria Pagecache→

How to skip an Ansible task by default

Posted on 2 February 2021 by Federico Razzoli — 2 Comments ↓

Ansible can skip certain tasks by default. This can be useful when we automate databases. Let’s see how to do it and why. Continue reading How to skip an Ansible task by default→

Can we shrink InnoDB Buffer Pool?

Posted on 21 January 2021 by Federico Razzoli — No Comments ↓

An oversized InnoDB buffer pool will consume too many resources and can be slower than necessary. Let’s see how to check if we can shrink it. Continue reading Can we shrink InnoDB Buffer Pool?→

Is InnoDB Buffer Pool big enough?

Posted on 6 January 2021 by Federico Razzoli — 2 Comments ↓

InnoDB buffer pool is the most important memory area to allocate. It contains the most frequently read data and index entries from InnoDB tables. Let’s see how to check if it is big enough. Continue reading Is InnoDB Buffer Pool big enough?→

MariaDB/MySQL IS NULL conditions and indexes

Posted on 14 November 2020 by Federico Razzoli — 2 Comments ↓

It is quite common to use an equality condition and an IS NULL condition on the same columns. Unfortunately, this could make queries very slow. Continue reading MariaDB/MySQL IS NULL conditions and indexes→

Monitoring that AUTO_INCREMENT values won’t reach the limit

Posted on 13 November 2020 by Federico Razzoli — 4 Comments ↓

AUTO_INCREMENT primary keys are useful, because they save usthe trouble to generate a unique value for every row, delegating this task to the database. But when we reach the limit we need to take some action, or we won’t be able to insert more rows. Continue reading Monitoring that AUTO_INCREMENT values won’t reach the limit→