Disable swap

Elastic Stack Elasticsearch
1 
ERROR: bootstrap checks failed
memory locking requested for elasticsearch process but memory is not locked

I am getting this error while bringing up ES. I am running my ES as user. How to lock the memory while running it as a user???

2

What I did to get rid of that same error was to add one line to /etc/default/elasticsearch

cat /etc/default/elasticsearch
MAX_LOCKED_MEMORY=unlimited

From the config file

# The maximum number of bytes of memory that may be locked into RAM
# Set to "unlimited" if you use the 'bootstrap.memory_lock: true' option
# in elasticsearch.yml.
# When using Systemd, the LimitMEMLOCK property must be set
# in /usr/lib/systemd/system/elasticsearch.service
#MAX_LOCKED_MEMORY=unlimited

Hope that helps.

3 
[root@gems14 ~]# cat /etc/default/elasticsearch
cat: /etc/default/elasticsearch: No such file or directory

I installed elasticsearch as a service using rpm (v5.2)

4

Have a look at https://www.elastic.co/guide/en/elasticsearch/reference/5.3/bootstrap-checks.html

5

Here Its showing that mlockall is thre

  {
      "nodes": {
        "VjsbRxcvTW2zNrDIoGob3Q": {
          "process": {
            "mlockall": true
          }
        }
      }
    }

But in the node stats I am getting 45 MB swap memory.

"swap": {
              "total_in_bytes": 33554423808,
              "free_in_bytes": 33506545664,
              "used_in_bytes": 47878144
            }

Is my ES swap is really disabled???

6

Can anyone help on this???

7

Swap is in the Operating System section of Node Stats. OS values are for the whole node, not just the Elasticsearch process. The swap usage is likely due to a different process.

Rob

8

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