"Sailer, Denis (YBUSA-CDR)" <[EMAIL PROTECTED]> writes: > We are evaluating PostgreSQL for a typical data warehouse application. I > have 3 tables below that are part of a Star schema design. The query listed > below runs in 16 seconds on Oracle 9.2 and 3+ minutes on PostgreSQL 7.3.3 > Here are the details.
The majority of the runtime seems to be going into the sort step. There is not much to be done about this in 7.3, but 7.4 should use a hashed aggregation approach for this query, which'd eliminate the sort step and hopefully reduce the time a great deal. Since you're only doing evaluation at this point, it might be worth your while to try out CVS tip ... regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings