"David G. Johnston" <david.g.johnston@xxxxxxxxx> writes: > On Tuesday, November 10, 2020, Wells Oliver <wells.oliver@xxxxxxxxx> wrote: >> Hey all: I was wondering if someone might spell out which setting has more >> impact on temporary tables being stored in memory versus disk? I have read >> the docs but I thought I'd reach out and ask the community: I keep >> increasing both in some scripts where Large Temp Tables are created, but >> I'm wondering if it's more efficient just to use one or the other. > IIUC work_mem has nothing to do with temporary tables. All tables have a > disk component and read/writes are done via buffers. The temp_buffers setting controls how much temporary-table data can be kept in a session's memory. If you get to more than that, it spills out to disk (or at least to the kernel's disk buffers). regards, tom lane
