On Sun, Feb 16, 2014 at 6:26 PM, Robert Haas <robertmh...@gmail.com> wrote:

> The current bgwriter_lru_maxpages value limits the background writer
>  to a maximum of 4MB/s.  If one imagines shared_buffers = 8GB, that
> starts to seem rather low, but I don't have a good feeling for what a
> better value would be.

I don't quite understand the point of bgwriter_lru_maxpages in the first
place.  What is it supposed to protect us from?

I wonder if that isn't an artefact from when the checkpointer was the same
process as the background writer, to prevent the background writer
functionality from starving the checkpointer functionality.



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