Hi, Thanks Martin Kersten, Alex Ossipov and Martin van Dinther for the valuable advice! It’s actually quite impressive to see how well MonetDB being a “knobless” system performs without any performance tuning. That’s what you do most of your day when using “big data” technologies from my experience 😉 but it’s of course not what you’re ultimately aiming to do… I think it could be considered as a unique selling point for MonetDB. Maybe the website should highlight this more and improve new user’s confidence level (indexes are not missing features but tuned automatically (how?)…., etc.). I’ll give PKs and FKs a shot to see how they affect performance. General advice, hire a working student and have her or him revamp the website 😃 There’s quite a bit of information but sometimes outdated and hard to navigate. My journey into MonetDB land continues, no blockers so far. Kind regards, Daniel