Thank You for all responces.
Munin, afaik cant provide statistics per user- Ive used it before, on cPanel but it only gives me "total", summarize stats per whole server- not per user. But If I mistaken - please post tutorial if You can ;-)
I am looking for a solution to have simple stats like concurrent connections, visitors count, bandwidth but per user in long time-frame (no TOP like information - this second only)
Is this possible?
Basically - for 60 users I have on my server, one of them stress server very much and I can find which user cause this.
High load is purely random to that extend that every few days apache hang and stop serving pages. Manual restart help but I would like to pinpoint user (and dont have time to sit 24h and look after every load spikes ;-D)
Ill look into "Glances"