I've done some testing across various systems (both "large" and
Increasing NR_CPUS seems to have a negligible effect. I see about a 1.1M
increase in memory usage when switching between 128 cpus and 5120 cpus. Since
most systems ship with 4G or more these days, I cannot see an issue with
consuming a small amount of memory like this.
The current NR_CPUS in Fedora is 128 and the current NR_CPUS in RHEL7 is 5120.
I do not see any reason that those values have to be different anymore.