From: David Boreham <david_list@boreham.org>
To: Harald Armin Massa <haraldarminmassa@gmail.com>
Cc: Magnus Hagander <mha@sollentuna.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: measuring shared memory usage on Windows
Date: Mon, 16 Oct 2006 06:27:24 -0600
Message-ID: <45337AAC.6060209@boreham.org> (raw)
In-Reply-To: <7be3f35d0610160518h649c8f20pee9949a90796c346@mail.gmail.com>
References: <7be3f35d0610160418u51e4d256k15ee2a5e4ba9433@mail.gmail.com>
<6BCB9D8A16AC4241919521715F4D8BCEA357F4@algol.sollentuna.se>
<7be3f35d0610160518h649c8f20pee9949a90796c346@mail.gmail.com>
> really makes me think that that area is just a comfortable way to
> access files on disk as memory areas; with the hope of propably better
> caching then not-memory-mapped files.
No, absolutely not. CreateFileMaping() does much the same thing
as mmap() in Unix.
> That would explain my disturbing impressions of performance of
> PostgreSQL on win32 rising when lowering shared_memory...
I don't know what your disturbing impressions are, but no it
doesn't explain them.
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To: pgsql-performance@postgresql.org
Cc: david_list@boreham.org, haraldarminmassa@gmail.com, mha@sollentuna.net
Subject: Re: measuring shared memory usage on Windows
In-Reply-To: <45337AAC.6060209@boreham.org>
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