Re: Page at a time index scan - Mailing list pgsql-patches

From Tom Lane
Subject Re: Page at a time index scan
Date
Msg-id 26483.1146598508@sss.pgh.pa.us
Whole thread Raw
In response to Re: Page at a time index scan  (Heikki Linnakangas <hlinnaka@iki.fi>)
Responses Re: Page at a time index scan  (Heikki Linnakangas <hlinnaka@iki.fi>)
Re: Page at a time index scan  (Simon Riggs <simon@2ndquadrant.com>)
List pgsql-patches
Heikki Linnakangas <hlinnaka@iki.fi> writes:
> On Tue, 2 May 2006, Tom Lane wrote:
>> Backwards scan may break this whole concept; are you sure you've thought
>> it through?

> I think so. The patch doesn't change the walk-left code. Do you have
> something specific in mind?

I'm worried about synchronization, particularly what happens if the page
gets deleted from under you while you don't have it pinned.

            regards, tom lane

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