>the refresh of UT is very slow and consuming
>
>It needs ages to read refresh any data.
>
>It also blocks the whole system on this, for example he have a livestream running. If UT refresh I can sometimes hear it - the liestream got problems.

I wouldn't know at this point what could cause such a situation. It would be very difficult for me to help if I cannot simulate it. Can you use WinMTR to levelextreme.com? I checked your stats and nothing is over 0.2 second for the transactions you did when you wrote this message.