Recently spent over a week in total (maybe 2 days net time) to realize that I was hitting this postgres bug – https://bugs.launchpad.net/ubuntu/+source/postgresql-9.5/+bug/1649877 . Documenting this just in case for the future, as it was pretty non-trivial to find that this was the issue I had. The weird part was that it started happening maybe… Continue reading PostgreSQL Fatal – semctl crash and user id