On Wed, Jan 15, 2014 at 5:34 AM, Jim Nasby <j...@nasby.net> wrote: > it's very common to create temporary file data that will never, ever, ever > actually NEED to hit disk. Where I work being able to tell the kernel to > avoid flushing those files unless the kernel thinks it's got better things > to do with that memory would be EXTREMELY valuable
Windows has the FILE_ATTRIBUTE_TEMPORARY flag for this purpose. ISTR that there was discussion about implementing something analogous in Linux when ext4 got delayed allocation support, but I don't think it got anywhere and I can't find the discussion now. I think the proposed interface was to create and then unlink the file immediately, which serves as a hint that the application doesn't care about persistence. Postgres is far from being the only application that wants this; many people resort to tmpfs because of this: https://lwn.net/Articles/499410/ Regards, Marti -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
