We are managing large SharePoint search application with 15 Million items in Indexer .
Search service is hosted in two servers with server1 as primary index component and server2 as replica.
We added 500 GB disk space to both servers initially and with the growing indexing items, the available free disk space is 150 GB.
Will index still continue till the 150 GB space consumed or the search service needs minimum free disk space?
How much minimum free space we should keep to run the index component without any disruption.