How to change Elasticsearch max memory size

Question

I have an Apache server with a default configuration of Elasticsearch and everything works perfectly, except that the default configuration has a max size of 1GB.

I

Answer 1

Instructions for ubuntu 14.04:

sudo vim /etc/init.d/elasticsearch

Set

ES_HEAP_SIZE=512m

then in:

sudo vim /etc/elasticsearch/elasticsearch.yml

Set:

bootstrap.memory_lock: true

There are comments in the files for more info