Two of my favorite talks:
Breaking Postgresql On Scale: Christophe Pettus talked about his experience in maintaining petabytes size Postgres databases. The talk had actionable advice for managing databases of all sizes. It had sections based on different database sizes. 10GB, 100GB, 1TB, 10TB and more. Christophe specifies the configuration parameters to tune when database size grows. It is interesting to note that postgreSQL is shipped as one binary that can run on your laptop and on the cloud for storing petabytes of data.
One interesting thing about Belgium: it is a multilingual and multicultural country. People speak French, Dutch and German. Still different cultural groups get along well with each other. Brussels is a big city. It is not as tidy and maintained like most Western European cities. Public transport is good but not great compared to Berlin. Traffic jams are a real problem here. It has some nice bars and cafes and Belgian beer is great. My Airbnb host gave me a map curated by locals in Brussels. It lists all the non-touristy places for tourists. That is how I found the Gist. They brew great beer play some loud Stoner rock. Café du Sablon have good coffee and a great vibe. My favourite thing to do in Brussels is strolling through the hilly roads.