[ale] TCP tuning for lots of connections?

[Erik Mathis]

This is usually what I use. You will also want to disable nf_conntrack for
iptables

echo '* - nofile 65000' >> /etc/security/limits.conf
echo '* - nproc unlimited' > /etc/security/limits.d/90-nproc.conf
echo "net.ipv4.ip_local_port_range=1024 65000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_tw_reuse=1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_fin_timeout=15" >> /etc/sysctl.conf
echo "net.core.netdev_max_backlog=4096" >> /etc/sysctl.conf
echo "net.core.rmem_max=16777216" >> /etc/sysctl.conf
echo "net.core.somaxconn=4096" >> /etc/sysctl.conf
echo "net.core.wmem_max=16777216" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_syn_backlog=20480" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_tw_buckets=400000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_no_metrics_save=1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_rmem=4096 87380 16777216" >> /etc/sysctl.conf
echo "net.ipv4.tcp_syn_retries=2" >> /etc/sysctl.conf
echo "net.ipv4.tcp_synack_retries=2" >> /etc/sysctl.conf
echo "net.ipv4.tcp_wmem=4096 65536 16777216" >> /etc/sysctl.conf
echo "vm.min_free_kbytes=65536" >> /etc/sysctl.conf



On Mon, Aug 5, 2013 at 3:33 PM, leam hall <leamhall at gmail.com> wrote:

> Any good things to look at for tuning TCP on a machine with a lot of
> incoming connections? So far I'm looking at
>
> net.ipv4.tcp_keepalive_time
>
> Any other recommendations?
>
> Thanks!
>
> Leam
> --
> Mind on a Mission <http://leamhall.blogspot.com/>
>
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