Increasing the number of tempdb files question about initial size I am planning on increasing the number of tempdbs we have on our sql cluster. I do have one question that I can't seem to find a clear cut answer to... 

I have one tempdb that is over 50GB and I want to add an additional 11 more tempdb files but I do not want them all to be 50GB so I want to 'shrink' the original tempdb but my question is if I set the initial size to 4GB on the original tempdb file and I bounce the server will it shrink the original tempdb to 4GB or will it stay at 50GB?

Or 

Should I just use DBCC SHRINKFILE (tempdev, 4096) on the original tempdb?
If you are going to bounce the server then nothing to do. 

Just define the files and the initial size and they will be built with the initial size when you restart the service. 

It does not shrink as nothing is retained in a log file.