On 21.03.2011 17:54, Merlin Moncure wrote:
Can't you make just one large mapping and lock it in 8k regions? I
thought the problem with mmap was not being able to detect other
processes 
(http://www.mail-archive.com/pgsql-general@postgresql.org/msg122301.html)
compatibility issues (possibly obsolete), etc.

That mail is about replacing SysV shared memory with mmap(). Detecting other processes is a problem in that use, but that's not an issue with using mmap() to replace shared buffers.

--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

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