How large can we increment index.max_ngram_diff?

Elastic Stack Elasticsearch
1

Hi, I have a question about NGramTokenizer .
https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules.html

I want to widen the difference between min_gram and max_gram. For example, min_gram = 1 and max_gram = 20. I know that it needs to set index.max_ngram_diff to suppress warning.

Why does this setting index.max_ngram_diff exist?
Once I tried to set big difference of max and min without setting index.max_ngram_diff and ran es.
It didn't happen anything just seeing Deprecated big difference between max_gram and min_gram in NGram Tokenizer,expected difference must be less than or equal to: [1].
It makes any bad effect (ex. slowly or failure search) if I ignore it?

Thank you.

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