Nice is an often forgotten but very useful part of coreutils. It adjusts the priority of the given command which in GNU/Linux (and UNIX) is called niceness. This name is quite convenient as it avoids the unnecessary confusion as to increase the priority the value has to be decreased. So a process with a high niceness value is "nice" to other processes.
The good thing about niceness is that it is inherited to child processes. So you just need to run your build script or make with nice:
nice -n 11 make -j8 all
All spawned processes (sub-make, compiler, linker etc.) get the same niceness value.
This can make a busy CI system responsive even under high
load.
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