Turn on performance mode for macOS Server

2017/01/06 Posted in OS

nvram boot-args

Turn on

sudo nvram boot-args="serverperfmode=1 $(nvram boot-args 2>/dev/null | cut -f 2-)"

Turn off

sudo nvram boot-args="$(nvram boot-args 2>/dev/null | sed -e $'s/boot-args\t//;s/serverperfmode=1//')"

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Increases some kernel/net parameters

kern.maxvnodes: 66560 > 300000
kern.maxproc: 1064 > 5000
kern.maxfilesperproc: 10240 > 150000
kern.maxprocperuid: 709 > 3750
kern.ipc.maxsockbuf: 4194304 > 8388608
kern.ipc.somaxconn: 128 > 1024
kern.ipc.nmbclusters: 32768 > 65536
kern.ipc.sbmb_cnt_peak: 1120 > 1170
kern.ipc.njcl: 10920 > 21840
kern.timer.longterm.qlen: 100 > 0
kern.timer.longterm.threshold: 1000 > 0
net.inet.ip.maxfragpackets: 1024 > 2048
net.inet.tcp.tcbhashsize: 4096 > 8192
net.inet.tcp.fastopen_backlog: 10 > 200
net.inet6.ip6.maxfragpackets: 1024 > 2048
net.inet6.ip6.maxfrags: 2048 > 4096
and some very special vm page-outs/compressor and and memory/cache settings

Other settings:

Increase the animation speed of sheets
Start up your Mac: Verbose mode
Reduce transparency and Reduce Motion: Placebo or not:)
Change the crash reporter behavior in OS X

Developer: This is the full crash reporter that will show the entire crash log whenever a program unexpectedly quits. This is the default behavior of the crash reporter.

Basic: This option will show you a warning whenever a program crashes, but will not display the entire crash log.

Server: This option will not launch the crash reporter and is the default setting for OS X Server, so the system will not launch and keep the crash reporter program open without a server admin desiring it to be.