Hello, What is PostgreSQL's likely behaviour when it encounters a large volume of data that is chronologically ordered (there's a btree index on a date column)? Is postgreSQL intelligent enough to discern that since the most frequently accessed data is invariably recent data, that it should store only that in memory, and efficiently store less relevant, older data on disk (the volume of data in production at the moment is still small enough to fit entirely in memory)? The application I maintain is not really a data warehousing app, but this is likely to be where I first encounter performance issues, if I ever do. Where can I learn more about this subject in general? Regards, John Moran -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general