Quote from bali_survivor:
Am sorry but you are mistaken.
Java is only utilising one CPU and is not multi threading. This leads to inconsistent behaviour like when starting IB's TWS up you have at times first to minimize TWS and then restore again before you can see the quotes. This never happened in the 4 years we were using single core CPU's.
If starting up two TWS accounts then they get both allocated to the same CPU / core creating an imbalance in the load.
Sorry that I have not better news for you.
Maria, over and out with this discussion.