Re: [PERFORM] join tables vs. denormalization by trigger

2007-09-04 Thread Marc Mamin
Hello, I had a similar issue and -atfer testing - decided to merge the tables B and C into a single table. In my case the resulting table contains a large proportion of nulls which limits the size increase... You'll have to do some testing with your data to evaluate the performance gain. Hope to

Re: [PERFORM] join tables vs. denormalization by trigger

2007-09-04 Thread Mark Lewis
On Tue, 2007-09-04 at 20:53 +0200, Walter Mauritz wrote: > Hi, > > I wonder about differences in performance between two scenarios: > > Background: > Table A, ~50,000 records > Table B, ~3,000,000 records (~20 cols) > Table C, ~30,000,000 records (~10 cols) > > a query every 3sec. with limit 10