On Wed, May 25, 2011 at 1:08 PM, Andrew Sullivan <a...@crankycanuck.ca> wrote:

> Note that "unneeded".  Obviously, you need more than that, probably
> because you're restoring the database in one transaction (so none of
> the files can be flushed).

That's the way SQLServer and Oracle work, but not PostgreSQL. We can
clear down WAL files even during a long running transaction.

For us, "unneeded" means prior to the second-to-last checkpoint record.

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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