Explaining verity index and document search limits

As present, we currently have a CF8 standard edition server which have some limitations around verity indexing. According to Adobe

Verity Server has the following document search limits (limits are for all collections registered to Verity Server):

 - 10,000 documents for ColdFusion Developer Edition 
 - 125,000 documents for ColdFusion Standard Edition
 - 250,000 documents for ColdFusion Enterprise Edition

We have now reached a stage where the server wide number of documents indexed exceed 125k. However, the largest开发者_StackOverflow中文版 verity collection consists of about 25k documents(and this is expected to grow). Only one collection is ever searched at a time. In my understanding, this means that I can still search an entire collection with no restrictions. Is this correct? Or does it mean that only documents that were indexed across all collection prior to reaching the limit are actually searchable?

We are considering moving to CF9 standard as a solution to this and to use the Solr solution which has no restrictions. The coldfusionjedi highlights some differences between Verity and Solr. However, before we upgrade I am trying to gain a clearer understanding of this before we commit to an upgrade.

Can someone provide me a clear explanation as to what this means and how it actually affects verity searching and indexing?

It is my understanding that only the first N (N being the limit for your edition) is searched.