Hello, I have a legacy Solr schema that I would like to update to take advantage of DocValues. I understand that by adding "docValues=true" to some of my fields, I can improve sorting/faceting performance. However, I have a couple of questions:
1.) Will Solr always take proper advantage of docValues when it is turned on, or will I gain greater performance by turning of stored/indexed in situations where only docValues are necessary (e.g. a sort-only field)? 2.) Will adding docValues to a field introduce significant performance penalties for non-docValues uses of that field, beyond the obvious fact that the additional data will consume more disk and memory? I'm asking this question because the existing schema has some multi-purpose fields, and I'm trying to determine whether I should just add "docValues=true" wherever it might help, or if I need to take a more thoughtful approach and potentially split some fields with copyFields, etc. This is particularly significant because my schema makes use of some dynamic field suffixes, and I'm not sure if I need to add new suffixes to differentiate docValues/non-docValues fields, or if it's okay to turn on docValues across the board "just in case." Apologies if these questions have already been answered - I couldn't find a totally clear answer in the places I searched. Thanks! - Demian
