On Tue, Sep 7, 2010 at 12:44 PM, Pavel Stehule <pavel.stehule@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
