On Wed, Jan 15, 2014 at 11:49:09AM +0000, Mel Gorman wrote: > It may be the case that mmap/madvise is still required to handle a double > buffering problem but it's far from being a free lunch and it has costs > that read/write does not have to deal with. Maybe some of these problems > can be fixed or mitigated but it is a case where a test case demonstrates > the problem even if that requires patching PostgreSQL.
We suspected trying to use mmap would have costs, but it is nice to hear actual details about it. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
