On Tue, Dec 22, 2009 at 10:19 AM, Thomas <freebsdjlu(at)gmail(dot)com> wrote:
> Does it write data to data files to make buffer "clean"?if it
> does ,but I can not find open files from the result of lsof -p
> PID.
>
writer actually takes care about writing pages down, from shared
memory. It is the central point that accesses disk on behalf of all
backends (which are spawned every time you create new connection).
--
GJ