---
# Increase number of TCP connections per port (debian default 128)
- name: Increasing number of TCP connections per port /etc/sysctl.conf net.core.somaxconn = 4096
  sysctl:
    name: net.core.somaxconn
    value: '4096'
    reload: yes
    state: present

# Increase open files (ulimit), default debian 1024
# View ulimit -a
- name: Increase soft open file limit (ulimit)
  pam_limits:
    domain: '*'
    limit_type: soft
    limit_item: nofile
    value: '65535'
- name: Increase hard open file limit (ulimit)
  pam_limits:
    domain: '*'
    limit_type: hard
    limit_item: nofile
    value: '65535'

# Enable Memory Overcommit /etc/sysctl.conf vm.overcommit_memory = 1
# View with sysctl -a |grep max_user_watches (default on debian is 8192)
- name: Increase fs.inotify.max_user_watches in /etc/sysctl.conf
  sysctl:
    name: fs.inotify.max_user_watches
    value: '524288'
    reload: yes
    state: present