Greg Smith <gsmith(at)gregsmith(dot)com> writes:
> With the new patch, the LRU writer is fairly well bounded in that it
> doesn't write out more than it thinks it will need; you shouldn't get into
> a situation where many more pages are written than will be used in the
> near future. Given that mindset, shouldn't pages the LRU scan writes just
> get moved onto the free list?
This just seems like a really bad idea: throwing away data we might
want. Furthermore, if the page was dirty, then it's probably been
accessed more recently than adjacent pages that are clean, so
preferentially zapping just-written pages seems backwards.
regards, tom lane