Jan Wieck <[EMAIL PROTECTED]> writes: > Okay, my proposal would be to have a VACUUM mode where it tells the > buffer manager to only return a page if it is already in memory, and > some "not cached" if it would have to read it from disk, and simply skip > the page in that case.
Since no such call is available at the OS level, this would only work well with very large shared_buffers settings (ie, you try to rely on PG shared buffers to the exclusion of kernel disk cache). AFAIK the general consensus is that that's not a good way to run Postgres. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings