Service and its price

I had pretty unpleasant phone call on Monday. One of application on our server had a trouble. It ate all RAM and the server froze. We couldn’t prevent this situation, because multiple applications share this server and the memory load was inside the Apache which is shared and it’s hard to find what is wrong exactly. But it’s not the interesting part. We are only servers provider and we don’t care much what users have on our servers. »