Are there any databases successfully in production in high-value transactional environments other than oracle or DB2? Yes, Postgres is often used and in-house

Are there any databases successfully in production in high-value transactional environments other than oracle or DB2? Yes, Postgres is often used and in-house developed DBs are fairly popular too. On the commercial side, Sybase still exists too! And of course SQL Server, tho' I am not aware of anyone using it on Linux in production yet. The inertia keeping DB2 in the BO is all the third party apps running on it - if they move they will need to persuade all their vendors to move en-masse to whatever comes next. FO software is a lot more bespoke and anything from outside tends to be chosen by people who know what they're doing. I have to believe a lot of the pain coinbase is experiencing stems from their decision to use mongodb Almost certainly. I would go in-house before Mongo any day of the week. That's if Postgres wasn't already a better JSON store than Mongo is...