Github user xuchuanyin commented on the issue:
https://github.com/apache/carbondata/pull/3046
We do not need to expose this threshold to the user. Instead, we can judge
ourselves in carbondata.
Step1. We can get the size of non-dictionary-encoded page (say M) and the
size of dictionary-encoded page (say N).
Step2: if M/N >=1 (or M/N >= 0.9), we can fallback automatically.
Parquet (maybe ORC) behaves like this.---
