Simulate a lack of system resources on a Linux machine

Question

Can anyone recommend a utility to simulate resource limits on a Linux system. I need to check the performance of a live system - both memory and processor.

I need something that would allocate memory, so I would leave less for the program under test.

And will also use all available CPU.

I prefer the utility out of the box, rather than writing it myself.

Answer 1

The stress program sounds the way you want it - it is described like this:

- POSIX. CPU, , I/O .

Answer 2

man ulimit

, , .