# Elasticsearch no arranca: A process of this unit has been killed by the OOM killer.

### Problema en el arranque inicial
Tras una instalación en limpio, en Ubuntu 22.04 con 32GB RAM obtuve el error, 
[Prevent elasticsearch from being killed by OOM killer](https://stackoverflow.com/questions/25355726/prevent-elasticsearch-from-being-killed-by-oom-killer)
[Out of memory: Kill process](https://discuss.elastic.co/t/out-of-memory-kill-process/65771)
```bash
❯ systemctl status elasticsearch.service
× elasticsearch.service - Elasticsearch
    Loaded: loaded (/lib/systemd/system/elasticsearch.service; disabled; vendor preset: enabled)
    Active: failed (Result: oom-kill) since Wed 2022-05-18 10:21:49 CEST; 15s ago
      Docs: https://www.elastic.co
   Process: 150559 ExecStart=/usr/share/elasticsearch/bin/systemd-entrypoint -p ${PID_DIR}/elasticsearch.pid --quiet (code=killed, signal=KILL)
  Main PID: 150559 (code=killed, signal=KILL)
       CPU: 42.370s

may 18 10:21:42 abkrim-nox systemd[1]: Starting Elasticsearch...
may 18 10:21:49 abkrim-nox systemd[1]: elasticsearch.service: A process of this unit has been killed by the OOM killer.
may 18 10:21:49 abkrim-nox systemd[1]: elasticsearch.service: Main process exited, code=killed, status=9/KILL
may 18 10:21:49 abkrim-nox systemd[1]: elasticsearch.service: Failed with result 'oom-kill'.
may 18 10:21:49 abkrim-nox systemd[1]: Failed to start Elasticsearch.
may 18 10:21:49 abkrim-nox systemd[1]: elasticsearch.service: Consumed 42.370s CPU time.
``` 
#### Solución

Editar el fichero `/etc/default/elasticsearch`
```bash
# Additional Java OPTS
ES_JAVA_OPTS="-Xms8g -Xmx8g"
MAX_LOCKED_MEMORY=unlimited
```

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