es_heap_size.md

TIL if you have decided Elasticsearch maybe shouldn't get 50% of your RAM on your local machine you can adjust it with JVM options:

$ elasticsearch_path="$(brew --prefix)/etc/elasticsearch" # Assuming a Homebrew install on a Mac
$ mkdir -p $elasticsearch_path/jvm.options.d && echo "-Xms2g\n-Xmx2g" > $elasticsearch_path/jvm.options.d/heap.options
$ unset elasticsearch_path

Then restart the server:

$ brew services restart elasticesearch-full

https://www.elastic.co/guide/en/elasticsearch/reference/current/advanced-configuration.html#set-jvm-heap-size