Don't Manually Modify The PostgreSQL Data Directory!

I was lucky enough to get a chance to give my talk Avoiding, Detecting, and Recovering From Data Corruption at PGCONF.IN in February, before everything got shut down. The conference organizers did an amazing job with the video, which shows both me speaking and the slides I was presenting side by side. That's the first time a PostgreSQL conference has done the video that way, and I love it. One of the points that I raised in that talk was that you should not manually modify the contents of the PostgreSQL data directory in any way. To my surprise, the most frequent question that I was asked after giving the talk was "Really? What if I do XYZ?"

Who Contributed to PostgreSQL Development in 2019?

This is my fourth annual post on who contributes to PostgreSQL development. See previous posts in this series for methodology. I calculate that this year, 189 people were primary authors of at least one PostgreSQL commit. 37 of those people accounted for 90% of the new lines, and 12 people accounted for 66% of the new lines. In total, there were 2127 commits by 26 committers. The work of committing patches written by someone other than the committer was principally shared by 5 committers who committed 66% of the lines of non-self-authored code; 10 committers accounted for 90% of the lines of non-self-authored code.