[threeseed]

What does this mean ?

ElasticSearch starts off as a small Java application that wraps the Lucene library.

Obviously heap will increase with usage and number of documents but I am still confused how it is in any way "expensive".

[pauloxnet]

The stack I proposed in my article is pretty simple: Django + PostgreSQL (DB + FTS).

In other project I used Elastic for the search function: Django + PostgreSQL (DB) + Haystack + ES (FTS).

Is obvious that the second solution is more expensive.