I had some exceptions in my current instance when installed a module. Does not matter what error for this question.

I found that the mentioned error was solved in a recent commit of v8.

I know I could test things in a different environment, but a crazy idea came to me, and I begun to install a new and updated instance in the same server, but using another port, so I can use the same postgresql server, over 3 or 4 different test databases.

Now the question: what if I open the same database with two different instances simultaneosly? What things should I take in consideration in my config files besides ports?

Should I expect some kind of exception?