How does number of fields in Coveo scale?
Does the number of fields in Coveo scale to RAM needed for indexing/searching in them linearly?
With Sitecore-SOLR integration we have an issue with that. The more fields you put into the index, the more memory it consumes. You end up setting up more nodes and tweaking with the fields a lot. It doesn't scale well for us.
The fields doesn't impact the RAM at all. It is not stored in RAM. The only thing it can impact is the queries performance. The more fields are on the documents, the longest it takes to stream them on the line.