High disk watermark exceeded even when there is not much data in my index

Question

I\'m using elasticsearch on my local machine. The data directory is only 37MB in size but when I check logs, I can see:

[2015-05-17 21:31:12,905][WARN

Answer 1

this slightly modified curl command from the Elasticsearch 6.4 docs worked for me:

curl -X PUT "localhost:9200/_cluster/settings" -H 'Content-Type: application/json' -d'
{
  "transient": {
    "cluster.routing.allocation.disk.watermark.low": "2gb",
    "cluster.routing.allocation.disk.watermark.high": "1gb",
    "cluster.routing.allocation.disk.watermark.flood_stage": "500mb",
    "cluster.info.update.interval": "1m"
  }
}
'

if the curl -XPUT command succeeds, you should see logs like this in the Elasticsearch terminal window:

[2018-08-24T07:16:05,584][INFO ][o.e.c.s.ClusterSettings  ] [bhjM1bz] updating [cluster.routing.allocation.disk.watermark.low] from [85%] to [2gb]
[2018-08-24T07:16:05,585][INFO ][o.e.c.s.ClusterSettings  ] [bhjM1bz] updating [cluster.routing.allocation.disk.watermark.high] from [90%] to [1gb]
[2018-08-24T07:16:05,585][INFO ][o.e.c.s.ClusterSettings  ] [bhjM1bz] updating [cluster.routing.allocation.disk.watermark.flood_stage] from [95%] to [500mb]
[2018-08-24T07:16:05,585][INFO ][o.e.c.s.ClusterSettings  ] [bhjM1bz] updating [cluster.info.update.interval] from [30s] to [1m]

https://www.elastic.co/guide/en/elasticsearch/reference/current/disk-allocator.html