vi /etc/sysctl.conf
fs.aio-max-nr = 3145728
fs.file-max = 6815744
kernel.shmall = 131072000
kernel.shmmax = 536870912000
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576
vm.dirty_background_ratio = 5
vm.dirty_ratio = 10
vm.nr_hugepages = 122882
