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

Debugging Django code

Ever tried debugging Django code in the CLI offered by manage.py shell or shell_plus?

It gets nasty when you need to write more than few lines of code to run something.

Here’s what you can do instead:

import os

import django


os.environ['DJANGO_SETTINGS_MODULE'] = 'project.settings'
django.setup()


def main():
    print 'Hello world!'


if __name__ == '__main__':
    main()

Cleaning up old remote branches in Git

This time in fish.

git fetch origin --prune
git fetch --all
for branch in (git branch --remote | egrep -v 'develop|master|\*' | tr -d ' ' | sed 's/origin\///'); git push origin ":$branch"; end