Macs with OS X Server that need to run high-performance services can turn on performance mode to dedicate additional system resources for server applications.
OS X El Capitan 10.11 and later
To turn on performance mode in OS X El Capitan 10.11 and later, use the
nvram command to adjust the boot-args NVRAM variable. If you reset NVRAM, this setting will be cleared.
This command displays the boot-args NVRAM variable. If you see serverperfmode=1, performance mode is already turned on.
If performance mode isn't already turned on, you can enable it by setting serverperfmode=1 in the boot-args NVRAM variable with this command:
sudo nvram boot-args="serverperfmode=1 $(nvram boot-args 2>/dev/null | cut -f 2-)"
To disable performance mode, use this command:
sudo nvram boot-args="$(nvram boot-args 2>/dev/null | sed -e $'s/boot-args\t//;s/serverperfmode=1//')"
Earlier versions of OS X
To turn on performance mode in OS X Mountain Lion, OS X Mavericks, or OS X Yosemite, use the serverinfo command in Terminal.
To get the current mode, use the command:
To set high performance mode:
serverinfo --setperfmode 1
To disable high performance mode:
serverinfo --setperfmode 0
Transitioning to or from high performance mode requires a restart.
If you a developer and want to learn more about how performance mode can optimize your system for server-specific applications, see the sysctl(3) manual page.