MySQL Community Edition is distributed under the GPLv2 (GNU General Public License version 2), a widely recognized open-source license. While it allows free use of the software, it comes with strict obligations and limitations that can pose significant challenges for companies integrating MySQL into commercial products intended for distribution.
When talking about job queues, developers often reach for tools like Redis, RabbitMQ, or specialized systems like Sidekiq (in the Ruby ecosystem). Each of these is a perfectly valid option. postgres postgresql