On Tue, Sep 7, 2010 at 12:44 PM, Pavel Stehule <pavel.steh...@gmail.com> wrote: >> I don't see how you could do anything with this that you can't do with >> the existing implementation. It's not as if you can store pointers >> into an mmap'd block and then count on them being valid the next time >> you map the file... it might not end up at the same offset. > > you can, but you have to do preallocation and you have to use a FIXED flag.
MAP_FIXED? As TFM says: "Because requiring a fixed address for a mapping is less portable, the use of this option is discouraged." -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise Postgres Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
