Hi Juhani,
Thank you for your question and apologies for delay in getting to it. Semarchy xDM product comes with an inbuilt connection pool. You can use the documentation link to setup and open a Support ticket if you run into any issues. I do want to point out though having a connection pool for a very small user base might be detrimental to performance. So it would be good to know:
Juhani Saarinen