引用

开启高性能模式

nvram boot-args

boot-args NVRAM 变量。如果您看到 serverperfmode=1，则说明性能模式已开启

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

关闭高性能模式

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

sysctl -a查看的大致不同

kern.maxvnodes: 263168
kern.maxproc: 4256
kern.maxfilesperproc: 49152
kern.maxprocperuid: 2837
kern.ipc.somaxconn: 128
kern.ipc.nmbclusters: 65536
kern.ipc.njcl: 21840
kern.bootargs: 
kern.timer.longterm.threshold: 1000
kern.timer.longterm.qlen: 42
kern.timer.longterm.scan_pauses: 1
kern.ipc.sbmb_cnt_peak: 1078
net.inet.ip.maxfragpackets: 2048
net.inet.ip.maxchainsent: 14
net.inet.tcp.fastopen_backlog: 10
net.inet.tcp.tcbhashsize: 4096
net.inet6.ip6.maxfragpackets: 2048
net.inet6.ip6.maxfrags: 4096

kern.maxvnodes: 600000
kern.maxproc: 10000
kern.maxfilesperproc: 300000
kern.maxprocperuid: 7500
kern.ipc.somaxconn: 2048
kern.ipc.nmbclusters: 131072
kern.ipc.njcl: 43688
kern.bootargs: serverperfmode=1 
kern.timer.longterm.threshold: 0
kern.timer.longterm.qlen: 0
kern.timer.longterm.scan_pauses: 0
kern.ipc.sbmb_cnt_peak: 1117
net.inet.ip.maxfragpackets: 4096
net.inet.ip.maxchainsent: 4
net.inet.tcp.fastopen_backlog: 400
net.inet.tcp.tcbhashsize: 16384
net.inet6.ip6.maxfragpackets: 4096
net.inet6.ip6.maxfrags: 8192