I’m leaving this tip for you to find what exactly is running on sql server.
SELECT r.session_id, s.HOST_NAME, s.PROGRAM_NAME,
s.host_process_id, r.status, r.wait_time,
wait_type, r.wait_resource,
SUBSTRING(qt.text,(r.statement_start_offset/2) +1,
(CASE WHEN r.statement_end_offset = -1
THEN LEN(CONVERT(nvarchar(max), qt.text)) * 2
ELSE r.statement_end_offset
END -r.statement_start_offset)/2)
AS stmt_executing,r.blocking_session_id,
r.cpu_time,r.total_elapsed_time,r.reads,r.writes,
r.logical_reads, r.plan_handle
FROM sys.dm_exec_requests r
CROSS APPLY sys.dm_exec_sql_text(sql_handle) as qt, sys.dm_exec_sessions s
WHERE r.session_id > 50 and r.session_id=s.session_id
ORDER BY r.session_id, s.host_name, s.program_name, r.status
