What does DBCC SHRINKFILE do?
I have a database which is 11TB in size. I recently truncated over 5TB of data from this database.
(I am fully familiar with all the reasons why you would not normally shrink a database please)
I'm curious about what the DBCC SHRINKFILE command is actually doing because when I run the command to shrink a file which is about 650000 MB in size with 45% free space it doesn't seem to actually move any pages around.
The code in question is:
DBCC SHRINKFILE (N'FILENAME' , 650239)
When I monitor the performance metrics of the server on executing DBCC SHRINKFILE I see the following