Are You Sure You Want to Use MMAP in Your Database Management System?

[@JohnLeidegren]

I love your presentation. Compact and quite funny. Thank you for this. Interesting and useful information. Also, can't stress enough how much I appreciate that it's 10 minutes and not 1 hour long.

[@lolbubs11111]

The great thing about this talk is you can replace DBMS with just about any real application that interacts with data and it's still true.

[@Dht1kna]

I think mmap might start to be worth it if your data fits fully in memory? Can someone comment?

[@landship5664]

Thanks, your intervention saved a soul at exactly the right moment!

[@Dominik-K]

Thanks a bunch for this presentation and very well made video. And for the recommendation for the Buffer Pool lecture

[@zedwaregmail]

Build and run, then fix it if the product is still alive, which is the best practice of engineers. Make sure everything is under control and implemented in DBMS, which is the tradition of DB folks.

[@iconstleo]

Very useful information and I appreciate it very much!! As for the title options you had, I think that the final one is the best. You have a very good article and something less agressive attracts more old guys like me.

[@monfera]

1:45 "maybe you're focusing on one of the new markets Andy is excited about, like web3 or blockchain" 😂😂🤣

[@sui-chan.wa.kyou.mo.chiisai]

I would like to know more about Andy's thought about web3 and blockchain, any?

[@matthewalp3954]

Don't forget his favourite, graphs

[@myth2732]

Very interesting paper

[@VolkerGoller]

Think your alternative titels have more poetry. Anyway, good stuff! Remember back-in-the-days when I was looking for a decent way to do IPC with windows32 and people pointed me to file mapping. Brand new feature back then. And my intuitive reaction “WTF, why solve a simple problem with a complicated solution that even misses the point?”

[@KangJangkrik]

Filesystem exists for a reason. mmap only useful for accessing device file. If you want to handle real file, use fopen and friends instead!

[@qm3ster]

So, who's going to fix mongodb and influxdb?

[@erichocean8746]

Neither use MMAP anymore (hint: it's in the paper)

[@alexanderkachur9014]

Influx rewritten in Rust and using Apache Arrow nowadays