4.3.4. Load
In short: the load depends on what is normal for your system. My
old P133 running a firewall, SSH server, file server, a route
daemon, a sendmail server, a proxy server and some other services
doesn't complain with 7 users connected; the load is still 0 on
average. Some (multi-CPU) systems I've seen were quite happy with a
load of 67. There is only one way to find out - check the load
regularly if you want to know what's normal. If you don't, you will
only be able to measure system load from the response time of the
command line, which is a very rough measurement since this speed is
influenced by a hundred other factors.
Keep in mind that different systems will behave different with
the same load average. For example, a system with a graphics card
supporting hardware acceleration will have no problem rendering 3D
images, while the same system with a cheap VGA card will slow down
tremendously while rendering. My old P133 will become quite
uncomfortable when I start the X server, but on a modern system you
hardly notice the difference in the system load.