mongodb TTL not removing documents

Question

I have a simple schema like:

{
    _id: String,      // auto generated
    key: String,      // there is a unique index on this field
    timestamp: Date() /         


        

Answer 1

1. Can you show us what the inserted records actually look like?

2. How long is "never"? Because there's a big warning:

   Warning: The TTL index does not guarantee that expired data will be deleted immediately. There may be a delay between the time a document expires and the time that MongoDB removes the document from the database.

3. Does the timestamp field have an index already?