On 30.11.2010 19:22, Tom Lane wrote:
But having said that, I wonder whether we need a full-page image for a WAL-logged action that is known to involve only setting a single bit and updating LSN. Would omitting the FPI be any more risky than what happens now (ie, the page does get written back to disk at some point, without any image from which it can be rewritten if the write fails...)
You have to write a full-page image if you update the LSN, because otherwise the next update that comes along will not write a full page image.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
