Joachim Wieland wrote:
On Thu, Nov 12, 2009 at 1:04 AM, Andrew Chernow <a...@esilo.com> wrote:
I think a bsearch would be needed. Very busy servers that make heavy use of
notifies would be quite a penalty.
In such an environment, how many relations/channels is a backend
typically listening to?
Do you have average / maximal numbers?
We have a system where many libpq clients, ~2000 - 4000 per server (depends on
hardware), maintain a persistent backend connection. Each connection listens
for notifies, LISTEN 'client_xxx'. There are maybe 10 different reasons why a
NOTIFY 'client_xxx' is fired. Sometimes, notifies are broadcasted to all client
connections, or just portions of them.
The goal is real-time messaging to a large groups of computers/devices. Past
4000, the problem is distributed to a second, third, etc... server.
--
Andrew Chernow
eSilo, LLC
every bit counts
http://www.esilo.com/
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