内核优化

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_keepalive_time = 100
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 819200
net.ipv4.tcp_max_tw_buckets = 20000
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_wmem=4096 65536 16777216
net.core.netdev_max_backlog=300000
net.ipv4.ip_forward = 1
net.ipv4.tcp_ecn=0
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.default.rp_filter = 0
fs.inotify.max_user_instances = 1280

fs.inotify.max_queued_events = 163840

fs.inotify.max_user_watches = 8192000
vm.swappiness = 10
vm.drop_caches = 2
# TCP retry 5 times when failed
net.ipv4.tcp_retries2 = 5
# for backlog numbers
net.core.somaxconn = 65535