| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: New FSM patch |
| Date: | 2008-09-01 16:34:01 |
| Message-ID: | 1220286841.4371.180.camel@ebony.2ndQuadrant |
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| Lists: | 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.com
PostgreSQL Training, Services and Support
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