Mr. Hartmann wrote on his blog
Last week, I posted a story about my interaction with a software developer who uses FireBird (FB) as a back-end for their software. The short version is that they left FB’s settings at default and were using a really, REALLY old version of FB. This caused the application to have massive (18 minute) load times and hang the entire server, with just one client connected. Bellow (in the article) are the changes I made to increase overall performance of the application and server.