Scott Marlowe <smarlowe@xxxxxxxxxxxxxxxxx> writes: > On Fri, 2007-02-16 at 13:18, Henry, Nigel, CYFD wrote: >> We are at the beginning of the building of a 3-tier >> development/test/uat environment. We would like some advice on how >> the PostgreSQL database should be configured for this environment. > What exactly are you trying to accomplish with multiple PostgreSQL > instances here? I can't see there being any great advantage to three > separate instances than having three discrete databases defined in one > instance. Separating development and production instances seems perfectly sensible to me. For instance, if your development code triggers a crash in Postgres, you don't really want that event to take out your production sessions. Also, you might want to run Postgres version x+1 for awhile as development before replacing version x for production. regards, tom lane