There is a weird SQL Server 2008 R2 SP3 issue needs your help.
I have a SQL Server 2008 R2 with SP2 and other security patches on date. Normally, the CPU average loading is around 30% to 40%. Recently, I deployed SP3. After that, I found server CPU usage keeps in very high watermark, most time keeping on 100%. I checked the server from several different ways, there is no expensive queries or system status changes. During the troubleshooting, I found all regular queries spend more CPU resources than before. Once, I uninstalled SP3, everything goes well again.
Do you have the similar experience before? Or advice?