Memory footprint of individual indices at runtime

yet able to see a way to get that information on a per index basis when multiple indices have been opened and queried. I would be grateful if someone could point me into the right direction for this one. Many thanks! Cheers Florian Florian Buetow Software Engineer m: +44 7702 557267 p: +44 207

Maintaining sorting order (stored fields vs DocValue fields) while upgrading Lucene version

Hi, I am in the process of updating a large index from Lucene 4.x to 5.x and have two questions related to the sorting order. 1. Is it correct that stored fields can only be sorted on if they become a DocValue field in 5.x? 2. When "updating" stored fields to DocValue fields , is it required to