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Chris Mantle
Chris Mantle

Reputation: 6683

Can I get additional ElasticSearch index settings?

To optimize bulk insertions of a large amount of data into ElasticSearch indexes, I'm adding functionality to our driver to suspend index refreshes for a period of time. I've done this using admin indices update settings to set index.refresh_interval to -1 and the back to 1 second. However, I can't seem to find a way to get index.refresh_interval back from ElasticSearch, which means I can't get it to restore it later, can't do consistency checks against the index, and can't really test that what I've done has actually worked.

I've tried:

GET http://localhost:9200/[index_name]/_settings/

..but the result had only contained three settings, which seemed too few. Perhaps this REST call can take additional parameters to get more/different settings?

Upvotes: 0

Views: 385

Answers (1)

Chris Mantle
Chris Mantle

Reputation: 6683

Found the solution before I posted the question, but as I'd already typed the question out, I thought I'd post it and the answer.

Basically, that GET call against the _settings endpoint in the question is what you need. However, if index.refresh_interval hasn't been set on the index beforehand, either when created or through the _settings endpoint, it doesn't appear in the list of settings returned. It seems like ElasticSearch doesn't hold a value for the setting for its default (which is 1 second, "1s").

I assume that ES only returns settings that don't have defaults or have been changed from their default, for brevity. It's a little confusing to begin with though, especially as the documentation for admin indices get settings is a bit... brief.

Upvotes: 1

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