We have a Windows 2012 R2 server running SQL server 2012. The server is a virtual machine in ESXi 5.5.
One of the other engineers here gave the Virtual machine all 12 cores of the ESXI host.
My question is, Can I reduce the number of cores from12 back down to 4?
What impact would that have on either Windows Server 2012 R2 or SQL 2012?
Is it even possible or will I need to build a new server and migrate the databases?