Re: Bgwriter behavior

Added to TODO:

* Improve the background writer
 Allow the background writer to more efficiently write dirty buffers from the end of the LRU cache and use a clock
sweepalgorithm to write other dirty buffers to reduced checkpoint I/O
 


---------------------------------------------------------------------------

Simon Riggs wrote:
> On Wed, 2004-12-22 at 04:43, Tom Lane wrote:
> > Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > > So what are we doing for 8.0?
> > 
> > Well, it looks like RC2 has already crashed and burned --- I can't
> > imagine that Marc will let us release without an RC3 given what was
> > committed today, never mind the btree bug that Mark Wong seems to have
> > found.  So maybe we should just bite the bullet and do something real
> > about this.
> > 
> > I'm willing to code up a proposed patch for the two-track idea I
> > suggested, and if anyone else has a favorite maybe they could write
> > something too.  But do we have the resources to test such patches and
> > make a decision in the next few days?
> > 
> > At the moment my inclination is to sit on what we have.  I've not seen
> > any indication that 8.0 is really worse than earlier releases; the most
> > you could argue against it is that it's not as much better as we hoped.
> > That's not grounds to muck around at the RC3 stage.
> 
> Agreed, if somewhat reluctantly.
> 
> We may have the time to test, but it is clear that we do not have the
> time to validate those tests, then discuss and agree on the results.
> 
> Time to go with what we have.
> 
> [Mark's possible bug seems a higher priority for me.]
> 
> -- 
> Best Regards, Simon Riggs
> 
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please send an appropriate
>       subscribe-nomail command to majordomo@postgresql.org so that your
>       message can get through to the mailing list cleanly
> 

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073