On Tue, 2004-12-14 at 19:40, Tom Lane wrote:
> "Zeugswetter Andreas DAZ SD" <ZeugswetterA@spardat.at> writes:
> > Is it possible to do a patch that produces a dirty buffer list in LRU order
> > and stops early when eighter maxpages is reached or bgwriter_percent
> > pages are scanned ?
>
> Only if you redefine the meaning of bgwriter_percent. At present it's
> defined by reference to the total number of dirty pages, and that can't
> be known without collecting them all.
>
> If it were, say, a percentage of the total length of the T1/T2 lists,
> then we'd have some chance of stopping the scan early.
...which was exactly what was proposed for option (3).
--
Best Regards, Simon Riggs