I have an issue with my Exchange 2013 on 2012R2. The Content index files \ms\%default folder are consuming a large amount of space. We have a DAG with 3 databases.
DB1 - Size: 294GB, Index files are 140GB.
DB2 - Size: 29.53GB, Index files are 2.95GB.
DB3 - Size 128GB, Index files are 43.23.
With some searching I found that the DB1, and DB2 index folders seem to be a normal size which is 10% to 20% ish of the size of the db. However, DB1 is closer to 50%. I have attempted a restart and update of the servers in the DAG, they seem to be growing faster than I can give disk space.