update readme

Signed-off-by: Jakub Sokołowski <jakub@status.im>
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Jakub Sokołowski 2018-11-29 21:43:05 +01:00
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@ -11,8 +11,13 @@ https://www.elastic.co/guide/en/elasticsearch/guide/current/replica-shards.html
# Configuration
The main configuration that makes any difference are the JVM options like the ones related to HEAP size in `defaults/main.yml`:
The only mandatory configuration is the cluster name in [`defaults/main.yml`](defaults/main.yml):
```yaml
es_cluster_name: 'my-awesome-cluster'
```
The only other configuration that makes any difference are the JVM options like the ones related to heap size in:
```yaml
es_jvm_min_heap: 2g
es_jvm_max_heap: 2g
```