Hello Bob,
Does the problem regarding sqlsrvr.exe occupying huge memory persist? In case it does,do send us the details as to the time since when this problem occurs. Do you get any particular errors regarding Backup Exec in the event logs of windows? Is the backup exec application working well? In case the problem is resolved, do intimate us. If we do not receive your intimation within two business days, this post would be assumed answered and archived.
Regards.