SCVMM 2012 R2 database performance

Hello folks!

I've been digging into performance problems with our SCVMM 2012 R2 environment. This article seemed to apply to our environment as the job history was extremely high:

http://support.microsoft.com/kb/2009348/en-gb

So I implemented the resolution to reduce the job history.  That seems to have helped; however, I have been using Performance Monitor on the database server and have noticed that the VirtualManagerDB is averaging about 2000 transactions/sec.  

Also the top query by CPU usage is:

  DELETE FROM tbl_VMM_Lock Where TaskID = @TaskID

1. Am I right to assume that the transactions/sec is far too high?

2. Any thoughts what may be causing this number of transactions or suggestion on how I might find out?

Thanks!

-Fred.