sysctl

get or set kernel state

show value
ex:
sysctl -a | grep aio
->

kern.aiomax = 90
kern.aioprocmax = 16
kern.aiothreads = 4
kern.aiomax: 90
kern.aioprocmax: 16
kern.aiothreads: 4

modify value
ex:
sysctl -w kern.aioprocmax=1000