I have a server with 6 cores, I've installed SQL Server 2012 web edition, based on core licensing, allowing up to 16 cores. However, it only uses 4 cores. In the error log file:
2015-07-09 14:00:32.52 Server Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (X64) Dec 28 2012 20:23:12 Copyright (c) Microsoft Corporation Web Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: ) (Hypervisor) 2015-07-09 14:00:32.70 Server SQL Server detected 6 sockets with 1 cores per socket and 1 logical processors per socket, 6 total logical processors; using 4 logical processors based on SQL Server licensing. This is an informational message; no user action is required.
Should I define something else to use all cores?