Fix: SQL Server – using X logical processors based on SQL Server licensing, not using all processors

I had an experience where a server with 36 cores is using only 20 cores for SQL Server 2012.

It was identified that Enterprise Edition is being used which limit SQL to use only 20 CPUs.

Research indicates that the version can be upgraded with minimal impact but remember the server will be rebooted immediately after the upgrade.

Note: Always-On Availability Group feature check warning can be ignored;

SQLLicenseCorrectionLogin

Ref: https://blogs.msdn.microsoft.com/sql_shep/2012/06/21/sql-server-2012-license-core-limitaion/

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