SQL Server 2012 - RESOURCE MONITOR / PREEMPTIVE_XE_CALLBACKEXECUTE high CPU usage

Question

Hello, 
  We are currently in the process of migrating an existing clustered SQL Server 2008 R2 instance over to a clustered SQL Server 2012 instance as we phase out the Windows Server 2008 with SQL Server 2008 R2.
  The setup is identical for the SQL Server 2012 instance as it is on the SQL Server 2008 R2 instance.  (meaning the RAM and CPU are both the same or better on the SQL Server 2012 instance)
  The process in which we are migrating is that we're moving a few databases over to the new SQL Server 2012 instance each night.  What we've noticed is that the CPU usage is much higher on the SQL Server 2012 instance than on the previous
SQL Server 2008 R2 instance even though the there is only 1/2 of the databases migrated to the 2012 instance. 
  Running the following script:
;with cte ([totalCPU]) as (select sum(cpu) from master.dbo.sysprocesses)
select
tblSysprocess.spid
, tblSysprocess.cpu
, CONVERT(BIGINT,(tblSysprocess.cpu * CONVERT(BIGINT,100))) / CONVERT(BIGINT, cte.totalCPU) as [percentileCPU]
, tblSysprocess.physical_io
, tblSysprocess.memusage
, tblSysprocess.cmd
, tblSysProcess.lastwaittype
from master.dbo.sysprocesses tblSysprocess
cross apply cte
order by tblSysprocess.cpu desc
Produces the following results:
In a clustered environment, is this normal and if not, does anyone know what this means or how to reduce the CPU usage?
Thanks.

Answer 1

Hello,
The following query may help us identify extended events or audit configurations running on that SQL Server server that are producing that high CPU usage scenario.
SELECT
s.name
AS 'Sessions'
FROM
sys.server_event_sessions
AS s
WHERE
s.name
<> 'system_health'
and s.name
<> 'AlwaysOn_health';
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com