Our pooling was pretty shitty actually, but it didn't need to be fancy as 95% of our code was some sort of batch processing (as you guessed), after which the JV

Our pooling was pretty shitty actually, but it didn't need to be fancy as 95% of our code was some sort of batch processing (as you guessed), after which the JVM terminated. But yes, highly tweaked JDBC drivers over all. Hibernate has iterator methods, but I recall (in 2010) it still loaded the entire result set into memory, with a //TODO comment. I remember thinking "W...T...F..." I can't tell you how many -Xmx16G (or 32/64) flags I deleted...