On Fri, Apr 22, 2011 at 6:45 PM, Cédric Villemain <cedric.villemain.debian@xxxxxxxxx> wrote: > Are you sure it is a PAE kernel ? You look limited to 4GB. If my memory/knowledge serves me right, PAE doesn't remove that limit. PAE allows more processes, and they can use more memory together, but one process alone has to live within an addressable range, and that is still 4GB, mandated by the 32-bit addressable space when operating in linear addressing mode. But linux kernels usually reserve 1GB for kernel stuff (buffers and that kind of stuff), so the addressable portion for processes is 3GB. Take away 2.5GB of shared buffers, and you only leave 0.5G for general data and code. Really, lowering shared_buffers will probably be a solution. Moving to 64 bits would be a better one. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
