Ubuntu Server optimization

The following guide can help you optimize your Ubuntu server in order to be able to support a high number of requests, without reaching any of the defaults limits. It is not meant for security, only performance.

After configurations are done, please reboot your server.

Tune global limits

fs.file-max=1048576
fs.inotify.max_user_instances=1048576
fs.inotify.max_user_watches=1048576
fs.nr_open=1048576
net.core.default_qdisc=fq
net.core.netdev_max_backlog=1048576
net.core.rmem_max=16777216
net.core.somaxconn=65535
net.core.wmem_max=16777216
net.ipv4.ip_local_port_range=1024 65535
net.ipv4.netfilter.ip_conntrack_max=1048576
net.ipv4.tcp_fin_timeout=5
net.ipv4.tcp_max_orphans=1048576
net.ipv4.tcp_max_syn_backlog=20480
net.ipv4.tcp_max_tw_buckets=400000
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_rmem=4096 87380 16777216
net.ipv4.tcp_slow_start_after_idle=0
net.ipv4.tcp_synack_retries=2
net.ipv4.tcp_syn_retries=2
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_wmem=4096 65535 16777216
net.nf_conntrack_max=1048576
vm.max_map_count=1048576
vm.min_free_kbytes=65535
vm.overcommit_memory=1
vm.swappiness=0
vm.vfs_cache_pressure=50

Tune user limits

*               soft    nofile          1048576
* hard nofile 1048576
root soft nofile 1048576
root hard nofile 1048576
* soft nproc 1048576
* hard nproc 1048576
root soft nproc 1048576
root hard nproc 1048576
* soft memlock unlimited
* hard memlock unlimited
root soft memlock unlimited
root hard memlock unlimited
* soft core 0
* hard core 0
root soft core 0
root hard core 0

Tune systemd limits

[Manager]
DefaultLimitNOFILE=1048576
DefaultLimitNPROC=1048576
DefaultLimitMEMLOCK=infinity

Originally published at docs.peer5.com by Chucky

--

--

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Peer5

Peer5 is now a Microsoft Company and available as Microsoft eCDN