Why shared_buffers max is 8GB?

From: Alexey Vasiliev <leopard_ne(at)inbox(dot)ru>
To: pgsql-performance(at)postgresql(dot)org
Subject: Why shared_buffers max is 8GB?
Date: 2014-03-26 12:21:51
Message-ID: 1395836511.796897979@f327.i.mail.ru
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I read from several sources, what maximum shared_buffers is 8GB.

Does this true? If yes, why exactly this number is maximum number of shared_buffers for good performance (on Linux 64-bits)?

Thanks!

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