Slow overall performance in Desktop Central

Slow overall performance in Desktop Central

Hi, 
We have an in house Desktop Central server and lately I've noticed significant decrease in performance there is a delay accessing pretty much any of the tabs in the console. Is there a way to improve speed in DC with MSSQL 2012 db? We have about 500 managed computers and use DC for pretty much everything. The box itself has plenty of resources
Has anyone seen anything like this? any ideas?

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