What I actually did
-------------------

*/etc/security/limits.conf*

```
elasticsearch hard memlock 100000
```

*/etc/default/elasticsearch*
  
```
ES_HEAP_SIZE=128m
MAX_LOCKED_MEMORY=100000
ES_JAVA_OPTS=-server
```

*/etc/elasticsearch/elasticsearch.yml*
 
```
index.number_of_shards: 1
index.number_of_replicas: 0
```

Advice I read
-------------
http://blog.lavoie.sl/2012/09/configure-elasticsearch-on-a-single-host.html (for an old version)

```
Edit /etc/security/limits.conf and add: elasticsearch hard memlock 100000

Edit the init script: /etc/init.d/elasticsearch
Change ES_HEAP_SIZE to 10-20% of your machine, I used 128m
Change MAX_LOCKED_MEMORY to 100000 Be sure to set it at the same value as 1.1
Change JAVA_OPTS to "-server"

Edit the config file: /etc/elasticsearch/elasticsearch.yml
index.number_of_shards: 1
index.number_of_replicas: 0
index.term_index_interval: 256
index.term_index_divisor: 5
network.host: 127.0.0.1
network.tcp.block: true
```

http://stackoverflow.com/questions/18132719/how-to-change-elasticsearch-max-size

```
	/etc/security/limits.conf:
	elasticsearch - nofile 65535
	elasticsearch - memlock unlimited

	/etc/default/elasticsearch:
	ES_HEAP_SIZE=512m
	MAX_OPEN_FILES=65535
	MAX_LOCKED_MEMORY=unlimited

	/etc/elasticsearch/elasticsearch.yml:
	bootstrap.mlockall: true
```