anchor.diff:  These configuration files are documented in <<settings>> and <<jvm-options>>.
   
   The image offers several methods for configuring {es} settings with the
  -conventional approach being to provide customized files, that is to say
  -`elasticsearch.yml`, but it's also possible to use environment variables to set
  +conventional approach being to provide customized files, that is to say,
  +`elasticsearch.yml`. It's also possible to use environment variables to set
   options:
   
   ===== A. Present the parameters via Docker environment variables
  
positive.code: 
  To apply the setting on a live system type: `sysctl -w vm.max_map_count=262144`
  --
  
  * macOS with https://docs.docker.com/engine/installation/mac/#/docker-for-mac[Docker for Mac]
  +
  --
  
negative.code: ulimits is by running:
  
    docker run --rm centos:7 /bin/bash -c 'ulimit -Hn && ulimit -Sn && ulimit -Hu && ulimit -Su'
  
  --
  
  . Swapping needs to be disabled for performance and node stability. This can be
  