Index level settings in elasticsearch v5.0

[1222kkk (new to Es)]

Hi all,

I noticed that index level settings can't be set in elasticsearch.yml.

I just wonder how I can set indices.fielddata.cache.size ?

and other index memory cache settings like this one.

[dadoonet (David Pilato)]

DELETE index
PUT index
{
  "settings": {
    // Settings here
  }
}

[1222kkk (new to Es)]

Thanks for you reply.

I still have some confusion:

1. If I want to set the whole cluster index, I have to set this in each index one by one？

2. Once a index is created, can I still dynamically change the settings like indices.fielddata.cache.size?

[dadoonet (David Pilato)]

One by one for existing indices yes. That was the same when those settings where available in elasticsearch.yml BTW.

You can change dynamically some settings. See https://www.elastic.co/guide/en/elasticsearch/reference/5.5/indices-update-settings.html

[1222kkk (new to Es)]

Oh,
I found that settings like indices.xx still work while index.xx may result in errors.

referring to

https://www.elastic.co/guide/en/elasticsearch/reference/5.5/modules-fielddata.html