"Benjamin Krajmalnik" <kraj@illumen.com> writes:
> I am setting up a test environment to simulate a very high load. We
> have a server farm which is receiving data (cold be thousands of
> simultaneous users posting data). I currently have max_connections set
> to 500 and the server is starting ok. If I try to increase the
> max_connections to 1000, the server is unable to start. I am running a
> VM with 4GB RAM. Swap space is not being used, and the system is
> showing about 1.5GB of ram not being utilized.
Quite honestly, you're living in fantasy land if you expect to support
1000 concurrently active backends on such a restricted server. Get
yourself a connection pooler and knock down max_connections to 100 or
so.
regards, tom lane