Frank, > I understand tuning PG is almost an art form, yet it should be based on > actual usage patterns, not just by system dimensions, don't you agree? Well, it's both. It's more that available RAM determines your *upper* limit; that is, on Linux, you don't really want to have more than 20% allocated to the shared_buffers or you'll be taking memory away from the kernel.
Within that limit, data size, query complexity and volume, and whether or not you have long-running procedures tell you whether you're at the low end or the high end. To futher complicate things, these calculations are all going to change with 7.5. -- -Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
