[xrstf]

> not throwing any effort into postgresql

The amount of research about the on-disk internals of both PostgreSQL and MySQL are a lot more effort than I would have probably spent (granted, I don't have a team of highly paid devs at my disposal, but still, I've seen technical decisions made on the basis of Google Trends...).

[pritambaral]

In my personal opinion, those bits of research aren't much, and they would have found it when they looked around for the cause of the write-amplification. A truly good amount of research would also have popped up heap-only-tuples, as mentioned here[0], or other ways to mitigate too many secondary-index updates.

0: https://news.ycombinator.com/item?id=12167161

[david_k_kim]

It is not much effort to understanding the storage of each database. It is like a common sense for database guys.