参数"setting key"net.core.somaxconn"无效"

Question

在编辑/etc/sysctl.conf并执行sysctl -p后,我尝试设置linux内核

它显示错误

Invalid argument" setting key "net.core.somaxconn"

Linux发行版:Ubuntu 12.04.4 LTS,x86_64,3.2.0-60-generic

$ cat /etc/sysctl.conf

net.ipv4.conf.eth0.arp_notify = 1
vm.swappiness = 0
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.somaxconn = 262144
net.core.netdev_max_backlog = 262144
fs.file-max = 1048576
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_max_syn_backlog = 409600
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_orphans = 262144

可以将net.core.somaxconn增加到262144吗？

Answer 1

当我试图微调我的nginx时,我遇到了同样的问题.这是针对ubuntu内核的补丁的问题.该

袜子结构的sk_max_ack_backlog字段被定义为unsigned short.

因此,积压参数inet_listen() 不应超过USHRT_MAX.listen()系统调用中的backlog参数被截断为somaxconn值.因此,somaxconn值不应超过65535(USHRT_MAX).

所以简而言之,要使你的"net.core.somaxconn"工作,你不应该给出大于65535的值

net.core.somaxconn = 65535

这很难过但我们不得不忍受它,除非你可以重新安装你的内核. https://lists.ubuntu.com/archives/kernel-team/2013-October/033041.html

谢谢