Doug Y wrote:
For idle persistent connections, do each of them allocate the memory specified by this setting (shared_buffers * 8k), or is it one pool used by all the connection (which seems the logical conclusion based on the name SHARED_buffers)? Personally I'm more inclined to think the latter choice, but I've seen references that alluded to both cases, but never a definitive answer.
The shared_buffers are shared (go figure) :). It is all one pool shared by all connections. The sort_mem and vacuum_mem are *per*connection* however, so when allocating that size you have to take into account your expected number of concurrent connections.
Paul
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