> Why isn't the OS caching the disk blocks, and why isn't Postgres using the > cached data? It does, but the cache is for each connection/job. They are not shared. -- Melvin Davidson Maj. Database & Exploration Specialist Universe Exploration Command – UXC Employment by invitation only!
That is simply not true: shared_buffers have this name for a reason. What’s not shared is work_mem used for sorting, etc… Also OS cache is shared too. Regards, Igor Neyman
