I worked on DB2 UDB in the 90s, and learnt a lot about DBs through all the improvements in isolation levels. Those were the days when you'd actually have to ma

I worked on DB2 UDB in the 90s, and learnt a lot about DBs through all the improvements in isolation levels. Those were the days when you'd actually have to make some judgement calls about setting specific isolation levels to improve performance. Nowadays you just chuck an SSD and several TBs of memory into the works (or talk to someone about some massively horizontally scaled solution, and distract from the real problem at hand).