Hello, I have deployed a simple elixir app by following the docs (Build, Deploy and Run an Elixir Application). This docs have instructions on connection a Postgresql db to that app. When I tried checking out the database metrics, I saw around 15 queries per second. All the queries were like this:
sum(pg_stat_database_numbackends{app="hello-elixir-db-serafeim"}) by (datname)
Could you please explain to me what’s the point of that query that is run 15 times per second!
Notice that this is an empty app and the database is not used at all!