logging system load

[Zbigniew Szalbot]

Dear all,

Is there a tool similar to top which would measure system load and write it
to a file that could later be analyzed? The time when my system is most
loaded happens between 3 and 5 a.m. so a trace of the system load would be
a wonderful thing to have. I need it to tailor some of the jobs
accordingly. Any advice?

Thanks in advance!

-- 
Zbigniew Szalbot