SELECT TOP 10
 [Wait type] = wait_type,
 [Wait time (s)] = wait_time_ms / 1000,
 [% waiting] = CONVERT(DECIMAL(12,2), wait_time_ms * 100.0 
               / SUM(wait_time_ms) OVER())
FROM sys.dm_os_wait_stats
WHERE wait_type NOT LIKE '%SLEEP%' 
ORDER BY wait_time_ms DESC;