William Bell <billnb...@gmail.com> wrote:

[docValues activation?]

> Also, does it help with "*Too many values for UnInvertedField faceting" ?*

Yes. There is an internal limit using UnInverted (aka fc without docValues) of 
16M somewhere - I am not sure exactly what it takes to trigger it, but many 
unique values and/or references will do it at some point.

docValues scales quite a bit higher; we have successfully used it with 7 
billion references to 640 million unique values in a single shard (where it 
worked surprisingly well BTW).

As far as I can see, there is an internal limit of 2 billion unique values per 
shard for docValues. I would like to see that go away, but that's just part of 
an ongoing mission to get Solr to break free from the old "2 billion should be 
enough for everyone"-design.

- Toke Eskildsen

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