uWSGI maximum scoket connections

Were you ever wondering why are you getting HTTP 502 responses from your uWSGI on high connection count?

Setting net.core.somaxconn might help.

Temporarily:

$ cat /proc/sys/net/core/somaxconn
# echo 4096 > /proc/sys/net/core/somaxconn

Temporarily with sysctl:

# sysctl -w net.core.somaxconn=1024

# echo 'net.core.somaxconn=1024' >> /etc/sysctl.conf

Reload kernel parameters after changes:

# sysctl -p

Change uWSGI settings for vassal:

cat /etc/uwsgi/vassals/vassal.ini
echo 'listen = 1024' >> /etc/uwsgi/vassals/vassal.ini

Restart uwsgi:

service uwsgi restart