Question

I’m doing some testing on a Linux server and I need the server to be on a heavy load. I was wondering how I would simulate this? Right now the server goes upto 20% CPU but I need to force it to around 80% and do some testing to see how it copes.

Answer 1

If you want to force CPU’s occupation, try this :

for cpu in 1 2 ; do
   ( while true; do true; done ) &
done

If you want to simualte IO charge too, try with this :

for cpu in 1 2 ; do
   ( while true; do find / -type f -exec cp {} /dev/null \; ; done ) &
done

with for cpu in 1 2 for 2 cores, for cpu in 1 2 3 4 for 4 cores 😉