Linux TCP/IP内核参数调优,网络高延迟大吞吐 三方案

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nano /etc/sysctl.conf

方案一:

vm.overcommit_memory = 1
fs.inotify.max_user_instances = 8192
net.ipv4.tcp_tw_reuse = 1
net.ipv4.ip_local_port_range = 1024 65535
net.core.somaxconn = 32768
net.core.wmem_default = 2097152
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_max_syn_backlog = 10240
net.core.netdev_max_backlog = 10240
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.conf.all.route_localnet=1
fs.file-max=1000000
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_ecn=0
net.ipv4.tcp_frto=0
net.ipv4.tcp_mtu_probing=0
net.ipv4.tcp_rfc1337=0
net.ipv4.tcp_sack=1
net.ipv4.tcp_fack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_adv_win_scale=1
net.ipv4.tcp_moderate_rcvbuf=1
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.ipv4.tcp_rmem=65536 1048576 16777216
net.ipv4.tcp_wmem=65536 1048576 16777216
net.ipv4.udp_rmem_min=8192
net.ipv4.udp_wmem_min=8192
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr # bbrplus
net.ipv4.ip_forward=1
net.ipv4.conf.all.forwarding=1
net.ipv4.conf.default.forwarding=1

方案二:

vm.overcommit_memory=1
net.core.rps_sock_flow_entries=32768 #rfs 设置此文件至同时活跃连接数的最大预期值
#net.ipv4.icmp_echo_ignore_all=1 #禁止 ping
#net.ipv4.icmp_echo_ignore_broadcasts=1
fs.file-max=1000000 # 系统级别的能够打开的文件句柄的数量
fs.inotify.max_user_instances=65536
#开启路由转发
net.ipv4.conf.all.route_localnet=1
net.ipv4.ip_forward=1
net.ipv4.conf.all.forwarding=1
net.ipv4.conf.default.forwarding=1

net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.lo.forwarding = 1
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0

net.ipv6.conf.all.accept_ra = 2
net.ipv6.conf.default.accept_ra = 2

net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.default.accept_redirects=0
net.ipv4.conf.all.secure_redirects=0
net.ipv4.conf.default.secure_redirects=0
net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.default.send_redirects=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.all.rp_filter=0

#ARP 回应的级别
#net.ipv4.conf.all.arp_ignore=2
#net.ipv4.conf.default.arp_ignore=2
#net.ipv4.conf.all.arp_announce=2
#net.ipv4.conf.default.arp_announce=2

net.ipv4.neigh.default.gc_stale_time=60 #ARP 缓存的存活时间

net.ipv4.tcp_syncookies=1 #开启 SYN Cookies。当出现 SYN 等待队列溢出时,启用 cookies 来处理
net.ipv4.tcp_retries1=3
net.ipv4.tcp_retries2=8
net.ipv4.tcp_syn_retries=2 #SYN 重试次数
net.ipv4.tcp_synack_retries=2 #SYNACK 重试次数
net.ipv4.tcp_tw_reuse=1 #开启 TIME-WAIT sockets 重用
net.ipv4.tcp_fin_timeout=15 #保持在 FIN-WAIT- 2 状态的时间
net.ipv4.tcp_max_tw_buckets=32768 #系统同时保持 TIME_WAIT socket 的数量
#net.core.busy_poll=50
#net.core.busy_read=50
net.core.dev_weight=4096
net.core.netdev_budget=65536
net.core.netdev_budget_usecs=4096
net.ipv4.tcp_max_syn_backlog=262144 #对于还未获得对方确认的连接请求,可保存在队列中的最大数目
net.core.netdev_max_backlog=32768 #网口接收数据包比内核处理速率快状态队列的数量
net.core.somaxconn=32768 #每个端口最大的监听队列的数量
net.ipv4.tcp_notsent_lowat=16384
net.ipv4_timestamps=0 #TCP 时间戳的支持
net.ipv4.tcp_keepalive_time=600 #TCP 发送 keepalive 探测消息的间隔时间(秒)net.ipv4.tcp_keepalive_probes=5 #TCP 发送 keepalive 探测确定连接已经断开的次数
net.ipv4.tcp_keepalive_intvl=15 #探测消息未获得响应时,重发该消息的间隔时间
vm.swappiness=1
net.ipv4.route.gc_timeout=100
net.ipv4.neigh.default.gc_thresh1=1024 #最小保存条数。当邻居表中的条数小于该数值,则 GC 不会做任何清理
net.ipv4.neigh.default.gc_thresh2=4096 #高于该阈值时,GC 会变得更激进,此时存在时间大于 5s 的条目会被清理
net.ipv4.neigh.default.gc_thresh3=8192 #允许的最大临时条目数。当使用的网卡数很多,或直连了很多其它机器时考虑增大该参数。net.ipv6.neigh.default.gc_thresh1=1024
net.ipv6.neigh.default.gc_thresh2=4096
net.ipv6.neigh.default.gc_thresh3=8192
net.netfilter.nf_conntrack_max=262144
net.nf_conntrack_max=262144
net.netfilter.nf_conntrack_tcp_timeout_established=36000 #ESTABLISHED 状态连接的超时时间
# TCP 窗口
net.ipv4.tcp_fastopen=3 # 开启 TCP 快速打开
net.ipv4.tcp_autocorking=0
net.ipv4.tcp_slow_start_after_idle=0 #关闭 TCP 的连接传输的慢启动
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_ecn=0
net.ipv4.tcp_frto=0
net.ipv4.tcp_mtu_probing=0
net.ipv4.tcp_rfc1337=0
net.ipv4.tcp_sack=1
net.ipv4.tcp_fack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_adv_win_scale=1
net.ipv4.tcp_moderate_rcvbuf=1
net.core.rmem_max=33554432
net.core.wmem_max=33554432
net.ipv4.tcp_rmem=4096 87380 33554432
net.ipv4.tcp_wmem=4096 16384 33554432
net.ipv4.udp_rmem_min=8192
net.ipv4.udp_wmem_min=8192
net.ipv4.tcp_mem=262144 1048576 4194304
net.ipv4.udp_mem=262144 524288 1048576
# BBR
net.ipv4.tcp_congestion_control=bbr
net.core.default_qdisc=fq

方案三:

vm.overcommit_memory=1
net.core.rps_sock_flow_entries=32768 #rfs 设置此文件至同时活跃连接数的最大预期值
#net.ipv4.icmp_echo_ignore_all=1 #禁止 ping
#net.ipv4.icmp_echo_ignore_broadcasts=1
fs.file-max=1000000 # 系统级别的能够打开的文件句柄的数量
fs.inotify.max_user_instances=65536
#开启路由转发
net.ipv4.conf.all.route_localnet=1
net.ipv4.ip_forward=1
net.ipv4.conf.all.forwarding=1
net.ipv4.conf.default.forwarding=1

net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.lo.forwarding = 1
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0

net.ipv6.conf.all.accept_ra = 2
net.ipv6.conf.default.accept_ra = 2

net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.default.accept_redirects=0
net.ipv4.conf.all.secure_redirects=0
net.ipv4.conf.default.secure_redirects=0
net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.default.send_redirects=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.all.rp_filter=0

#ARP 回应的级别
#net.ipv4.conf.all.arp_ignore=2
#net.ipv4.conf.default.arp_ignore=2
#net.ipv4.conf.all.arp_announce=2
#net.ipv4.conf.default.arp_announce=2

net.ipv4.neigh.default.gc_stale_time=60 #ARP 缓存的存活时间

net.ipv4.tcp_syncookies=1 #开启 SYN Cookies。当出现 SYN 等待队列溢出时,启用 cookies 来处理
net.ipv4.tcp_retries1=3
net.ipv4.tcp_retries2=8
net.ipv4.tcp_syn_retries=2 #SYN 重试次数
net.ipv4.tcp_synack_retries=2 #SYNACK 重试次数
net.ipv4.tcp_tw_reuse=1 #开启 TIME-WAIT sockets 重用
net.ipv4.tcp_fin_timeout=15 #保持在 FIN-WAIT- 2 状态的时间
net.ipv4.tcp_max_tw_buckets=32768 #系统同时保持 TIME_WAIT socket 的数量
#net.core.busy_poll=50
#net.core.busy_read=50
net.core.dev_weight=4096
net.core.netdev_budget=65536
net.core.netdev_budget_usecs=4096
net.ipv4.tcp_max_syn_backlog=262144 #对于还未获得对方确认的连接请求,可保存在队列中的最大数目
net.core.netdev_max_backlog=32768 #网口接收数据包比内核处理速率快状态队列的数量
net.core.somaxconn=32768 #每个端口最大的监听队列的数量
net.ipv4.tcp_notsent_lowat=16384
net.ipv4_timestamps=0 #TCP 时间戳的支持
net.ipv4.tcp_keepalive_time=600 #TCP 发送 keepalive 探测消息的间隔时间(秒)net.ipv4.tcp_keepalive_probes=5 #TCP 发送 keepalive 探测确定连接已经断开的次数
net.ipv4.tcp_keepalive_intvl=15 #探测消息未获得响应时,重发该消息的间隔时间
vm.swappiness=1
net.ipv4.route.gc_timeout=100
net.ipv4.neigh.default.gc_thresh1=1024 #最小保存条数。当邻居表中的条数小于该数值,则 GC 不会做任何清理
net.ipv4.neigh.default.gc_thresh2=4096 #高于该阈值时,GC 会变得更激进,此时存在时间大于 5s 的条目会被清理
net.ipv4.neigh.default.gc_thresh3=8192 #允许的最大临时条目数。当使用的网卡数很多,或直连了很多其它机器时考虑增大该参数。net.ipv6.neigh.default.gc_thresh1=1024
net.ipv6.neigh.default.gc_thresh2=4096
net.ipv6.neigh.default.gc_thresh3=8192
net.netfilter.nf_conntrack_max=262144
net.nf_conntrack_max=262144
net.netfilter.nf_conntrack_tcp_timeout_established=36000 #ESTABLISHED 状态连接的超时时间
# TCP 窗口
net.ipv4.tcp_fastopen=3 # 开启 TCP 快速打开
net.ipv4.tcp_autocorking=0
net.ipv4.tcp_slow_start_after_idle=0 #关闭 TCP 的连接传输的慢启动
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_ecn=0
net.ipv4.tcp_frto=0
net.ipv4.tcp_mtu_probing=0
net.ipv4.tcp_rfc1337=0
net.ipv4.tcp_sack=1
net.ipv4.tcp_fack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_adv_win_scale=1
net.ipv4.tcp_moderate_rcvbuf=1
net.core.rmem_max=33554432
net.core.wmem_max=33554432
net.ipv4.tcp_rmem=65536 1048576 33554432
net.ipv4.tcp_wmem=65536 1048576 33554432
net.ipv4.udp_rmem_min=8192
net.ipv4.udp_wmem_min=8192
net.ipv4.tcp_mem=262144 1048576 4194304
net.ipv4.udp_mem=262144 524288 1048576
# BBR
net.ipv4.tcp_congestion_control=bbrplus
net.core.default_qdisc=fq

 

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