无效的参数"设置键"net.core.somaxconn"; [英] Invalid argument" setting key "net.core.somaxconn"
问题描述
我尝试设置Linux内核.编辑/etc/sysctl.conf 并执行 sysctl -p
后它显示错误
I tried setting Linux kernel. After editing /etc/sysctl.conf and executing the sysctl -p
it shows error
Invalid argument" setting key "net.core.somaxconn"
Linux发行版:Ubuntu 12.04.4 LTS,x86_64、3.2.0-60-通用
Linux distribution: 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
我可以将 net.core.somaxconn
增加到 262144
吗?
推荐答案
当我尝试微调nginx时遇到了同样的问题.这是针对Ubuntu内核制作的补丁程序的问题.
Same issue I got into when I tried to fine tune my nginx. This is the problem with the patch that been made to Ubuntu kernel. The
袜子结构的sk_max_ack_backlog字段定义为无符号短
sk_max_ack_backlog field of the sock structure is defined as unsigned short.
因此, inet_listen()
中的积压参数不得超过 USHRT_MAX
. listen()
系统调用中的backlog参数被截断为 somaxconn
值.因此, somaxconn
的值不应超过 65535
( USHRT_MAX
).
Therefore, the backlog argument in inet_listen()
shouldn't exceed USHRT_MAX
. The backlog argument in the listen()
syscall is truncated to the somaxconn
value. So, the somaxconn
value shouldn't exceed 65535
(USHRT_MAX
).
因此,简而言之,要使您的 net.core.somaxconn
工作,您不应提供大于 65535
So in short to make your net.core.somaxconn
work you should not give value greater then 65535
net.core.somaxconn = 65535
net.core.somaxconn = 65535
这很可悲,但我们必须忍受它,除非您可以重新修补内核: https://lists.ubuntu.com/archives/kernel-team/2013-October/033041.html
This is sad but we have to live with it until unless you are ok to repatch your kernel: https://lists.ubuntu.com/archives/kernel-team/2013-October/033041.html
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