Re: New FSM patch - Mailing list pgsql-hackers

From Simon Riggs
Subject Re: New FSM patch
Date
Msg-id 1220286841.4371.180.camel@ebony.2ndQuadrant
Whole thread Raw
In response to New FSM patch  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
List pgsql-hackers
On Fri, 2008-08-29 at 10:47 +0300, Heikki Linnakangas wrote:

> - Per comments and discussion with Simon, I've changed the "bubble up" 
> behavior so that when a bottom-level page is updated, if the amount of 
> free space was decreased, the change is not immediately bubbled up to 
> upper page. Instead, searchers that traverse down the tree will update 
> the upper pages when they see that they're out of sync. This should 
> alleviate the worry that we need to keep a bottom-level page exclusively 
> locked across I/O.

Thanks for taking time with the new FSM.

-- Simon Riggs           www.2ndQuadrant.comPostgreSQL Training, Services and Support



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