On 04/22/2011 08:23 PM, Brian Fehrle wrote:
So long story short, if a cluster has zero activity, and archive_timeout is not set to 0, when it reaches that timeout should it generate a file, or just skip because it would be 100% empty?
You're right about what you've seen here, there is some logic in the WAL/checkpoint code that can avoid doing anything when the timeout hits, if there hasn't been any new WAL written since the last one. That hasn't changed for a while now though (since I've been watching that part of the source code at least) so I'm not sure what differences between 8.4.6 and earlier 8.4 versions you think you've observed.
-- Greg Smith 2ndQuadrant US greg@xxxxxxxxxxxxxxx Baltimore, MD PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.us "PostgreSQL 9.0 High Performance": http://www.2ndQuadrant.com/books -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
