Well, when you say (as you did in your first post) "Since last week our server become too slow" that is a pretty good clue. Pay attention when the users of a system say that they notice a...
You have 20 asasd processes running and each one is using about 5% of the system. The load average is over 20. And yet you say "it's nothing to do with heavy utilization, right?". Well that looks...