SERVER-8431 restricted inserting a document into a collection with a text index under the following circumstances:
- The number of unique terms in the fields indexed by the text index is greater than 400,000.
- The total size of those terms is greater than 4MB.
This was done to avoid causing the server to shut down from generating a group commit larger than 512MB. However, we have since increased the journaling capacity limit to 2000MB as part of
SERVER-17501. We should considering raising these limits to allows users to store more text data in a single document.