整理了魔改BBR centos6 sysctl.conf配置文档

ybbao

不知对不对？

#Tsunami BBR
fs.file-max = 51200
net.core.rmem_max = 67108864
net.core.wmem_max = 67108864
net.core.netdev_max_backlog = 250000
net.core.somaxconn = 4096
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 0
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.ip_local_port_range = 10000 65000
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_fastopen = 3
net.ipv4.tcp_rmem = 4096 87380 67108864
net.ipv4.tcp_wmem = 4096 65536 67108864
net.ipv4.tcp_mtu_probing = 1
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=tsunami

dupit8

你这是瞎改。

aboutyj

sysctl.conf参数的值并不是固定的，针对不同应用，不同硬件配置的机，就要相应得改，否则网络性能不一定有提升
例如128M的扶墙鸡，数值调大就并不一定合适，但例如2-4G的多核机，小了又不合适

naimaa

这个有什么修改方案？可以更猛？

nic2013

aboutyj 发表于 2017-7-22 13:25

sysctl.conf参数的值并不是固定的，针对不同应用，不同硬件配置的机，就要相应得改，否则网络性能不一定有 ...
大佬能不能详细说一下，那些地方要根据实际情况改参数大小 ？

larry

问题是改了以后有效果？

ybbao

默认就只有

net.ipv4.tcp_congestion_control=tsunami

其他的参数不懂，所以才请教。

scrollll

管他那么多

直接运行

echo "fs.file-max = 1024000" >> /etc/sysctl.conf
echo "net.core.rmem_max = 67108864" >> /etc/sysctl.conf
echo "net.core.wmem_max = 67108864" >> /etc/sysctl.conf
echo "net.core.rmem_default = 65536" >> /etc/sysctl.conf
echo "net.core.wmem_default = 65536" >> /etc/sysctl.conf
echo "net.core.netdev_max_backlog = 4096" >> /etc/sysctl.conf
echo "net.core.somaxconn = 4096" >> /etc/sysctl.conf
echo "net.ipv4.tcp_syncookies = 1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_tw_reuse = 1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_tw_recycle = 0" >> /etc/sysctl.conf
echo "net.ipv4.tcp_fin_timeout = 30" >> /etc/sysctl.conf
echo "net.ipv4.tcp_keepalive_time = 1200" >> /etc/sysctl.conf
echo "net.ipv4.ip_local_port_range = 10000 65000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_syn_backlog = 4096" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_tw_buckets = 5000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_fastopen = 3" >> /etc/sysctl.conf
echo "net.ipv4.tcp_rmem = 4096 87380 67108864" >> /etc/sysctl.conf
echo "net.ipv4.tcp_wmem = 4096 65536 67108864" >> /etc/sysctl.conf
echo "net.ipv4.tcp_mtu_probing = 1" >> /etc/sysctl.conf

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