So, the idea of this thread is to see the impact of the search on the server.
To find out the file size on disk, navigate to your elasticsearch index directory (/var/elasticsearch if you followed the guide in this forum) and run "du -ach"
Posts Indexed: ~1.2 million
Size on Disk: 925M Total
Min/Max Ram Allocated in config: 512mb/2048mb
Posts Indexed: ~4 million
Size of Disk: 2.9GB Total
MinMax Ram Allocated in config: 4096mb/4096mb