About Open Query

Open Query is an Australian based company with specific expertise in MySQL, MariaDB and related technologies.
Our services include consulting, scalable architecture, proactive remote DBA, system administration,
vendor neutral managed services with optional emergency support, mentoring, training, and security and code reviews.

Founded in 2007 by Arjen Lentz, previously MySQL AB (the original MySQL company) employee#25, Open Query was acquired by Catalyst IT Australia Pty Ltd in September 2018.

We have particular expertise in “optimisation by design”, maintenance (preventing trouble), scalability and performance tuning, and security. We dislike emergencies, so we focus on helping you prevent inevitable system failure from causing trouble in your overall infrastructure and online presence.

Our flagship pro-active support subscription is there for your ongoing needs for anything from tuning to replication setup to answering developer questions, and we also take proactive steps to ensure your servers’ health, providing you full value for money every month. We feel it most important to build an ongoing relationship.


The Open Query name and logo are trademarks of Catalyst IT Australia Pty Limited.  Other trademarks and registered trademarks are the property of their respective owners.