> I always use Super Server and I really don´t know what are the consequences of changing to Classic Server.

Well, If you have multicore or multiprocessor server you'll get
better performance. I don't think that you'll run out of memory with
your ~30 connections unless you had configured too high data page cache
at database level.

> Do you think that switching to Classic Server may solve the problem?

Yes, I suspect that. But you'll never know if you don't try.

SY, SD.