We cannot login to the SYSVUSER address space.
It is very long, around ten seconds and there are no error messages.
Why does it takes so long?
In fact, the dispatching priority you are using for SYSVUSER is too low.
You are using F0 dispatching priority for SYSVUSER and you need to set it at least to FE or FF.
Once the dispatching priority set to FF, you will be able to login quickly to your SYSVUSER address space.
You have to control the WLM service class assigned to the STC.