so you are concerned about your server not being at 0.00 for a load average?
keeping a shared hosting linux server at 0.00 as you pile accounts on it is, needless to say, an impossibility. If you want to keep things at 0.00, then you cannot allow CGI, period. You also cannot allow mysql transactions. You can allow static HTML, period.
The general rule here for a machine with 400-600 shared linux accounts, regardless of package type- would be something like:
0.00 - 0.50 = must be a slow weekend or christmas
0.50 - 1.00 = what we'd expect during normal business days.
1.00 - 1.50 = a fairly busy afternoon/evening on a weeknight.
1.50 - 2.00 = busy day on a normally busy box, not abnormal
2.00 - 2.50 = perhaps a bit TOO busy, check for abusive users
2.50 - 3.00 = slowly losing control of your box
3.00 - 3.50 = time to spend 30 minutes to an hour to assess what is causing your machine to turn to sludge
3.50+ = apache will be sluggish for most users, as will email..... time to evacuate people or pinpoint the abusers immediately.
I hope this helps and makes some sense.......
If not let me know.
I'm sure I will be corrected by an onslaught of viewers as time progresses. Load averages on linux lack a solid technical explanation though there are variety of 'rants' on the subject if you search long and hard enough.
Mostly it's just a guide for admins to use as they gain experience.