> > Thus, what does SERIALIZABLE READ ONLY achieve that REPEATABLE READ READ > ONLY does not? And what is SERIALIZABLE READ ONLY DEFERRABLE for? >
There is a nice walkthrough of the "control" and "batches/details" scenario mentioned in the docs, you can find it in the wiki, <https://wiki.postgresql.org/wiki/SSI#Deposit_Report> and I think it explains the difference well.
