Re: Redesigning checkpoint_segments

On 07/03/2013 11:28 AM, Peter Eisentraut wrote:
> On 6/6/13 4:09 PM, Heikki Linnakangas wrote:
> I don't understand what this patch, by itself, will accomplish in terms
> of the originally stated goals of making checkpoint_segments easier to
> tune, and controlling disk space used.  To some degree, it makes both of
> these things worse, because you can no longer use checkpoint_segments to
> control the disk space.  Instead, it is replaced by magic.
> 
> What sort of behavior are you expecting to come out of this?  In testing,
> I didn't see much of a difference.  Although I'd expect that this would
> actually preallocate fewer segments than the old formula.

Since I haven't seen a reply to Peter's comments from Heikki, I'm
marking this patch "returned with feedback".  I know, it's a very busy
CF, and I'm sure that you just couldn't get back to this one.  We'll
address it in September?

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com