Re: First set of OSDL Shared Mem scalability results, some wierdness ...

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Kevin Brown <kevin@sysexperts.com>
Cc: pgsql-performance@postgresql.org
Date: 2004-10-09T15:07:28Z
Lists: pgsql-hackers, pgsql-performance
Kevin Brown <kevin@sysexperts.com> writes:
> This is why I sometimes wonder whether or not it would be a win to use
> mmap() to access the data and index files -- 

mmap() is Right Out because it does not afford us sufficient control
over when changes to the in-memory data will propagate to disk.  The
address-space-management problems you describe are also a nasty
headache, but that one is the showstopper.

			regards, tom lane