There are a lot of valuable comments here. If I had to summarize what I think is the likely problem, I would say: look into pre-fetching where it makes sense.

There are a lot of valuable comments here. If I had to summarize what I think is the likely problem, I would say: look into pre-fetching where it makes sense. Databases are often troublesome beasts, and you have to do more management of the data than you would like.