Re: Free Space Map thoughts - Mailing list pgsql-hackers

From Simon Riggs
Subject Re: Free Space Map thoughts
Date
Msg-id 1194594640.4251.333.camel@ebony.site
Whole thread Raw
In response to Re: Free Space Map thoughts  (Gregory Stark <stark@enterprisedb.com>)
Responses Re: Free Space Map thoughts  (Heikki Linnakangas <heikki@enterprisedb.com>)
List pgsql-hackers
On Thu, 2007-11-08 at 23:04 +0000, Gregory Stark wrote:
> "Simon Riggs" <simon@2ndquadrant.com> writes:
> 
> > The pages might well be in cache, so the file location might well be
> > irrelevant from an I/O perspective. Maybe. The nth page solution allows
> > the FSM block to be easily located without any FSM index, so might well
> > be faster. Separate files mean more space and more fsyncs too. But even
> > so, I'm not sure either way.
> 
> I don't follow any of the logical leaps in this paragraph. 

I asked Heikki to explain why he felt the design should go a certain
way, which he didn't do. That's the logical leap I'm worried about.

I repeat: I'm not sure either way.

--  Simon Riggs 2ndQuadrant  http://www.2ndQuadrant.com



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