I currently run the search backend for helpmanual.io on a scaleway C1 server (2GB ram, 4 ARM cores, 50GB SSD). The search currently uses postgres 9.6's full text search but I'm considering migrating to elasticsearch.
Question: is elasticsearch 5.X likely to give a worthwhile query time improvement over postgres 9.X under these conditions?
Documents: ~30k documents varying from a few kb to I guess around 500kb. (The documents don't need to be stored, just the search vector, title and link)
Load: full text search, volume fairly low for now