[elephant-devel] Re: BDB vs postmodern

[Alex Mizrahi]

 IE> Is this caching something that we could import into BDB?

it is pretty easy to add caching inside one transaction or accross 
transactions assuming there is only one instance (and one thread) working 
with database. we can have this part implemented in the core and shared 
among backends..

cache that works accross transactions and supports multiple concurrent 
instances connected requires tracking changes (for examle, on btree level) 
and storing them in the database -- that requires considerable amount of 
work and is backend-specific. given that it should have much less effect on 
BDB, probably it's not worth implementing.