Yes, I had, but apparently the values were not high enough to accommodate
that many connections.
I retuned the IPC kernel setting, and now it appears to be
running fine.
Thanks.
From: Shoaib Mir
[mailto:shoaibmir@xxxxxxxxx]
Sent: Monday, August 10, 2009 11:51 PM
To: Benjamin Krajmalnik
Cc: pgsql-admin@xxxxxxxxxxxxxx
Subject: Re: Max connections
On Tue, Aug 11, 2009 at 3:42 PM, Benjamin Krajmalnik <kraj@xxxxxxxxxxx> wrote:
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.
Are there any other config setting which should be changed together with
max_connections to successfully start the postmaster?
Increasing max_connection will make PostgreSQL to request more System V shared
memory or semaphores than your operating system's default configuration allow.
Did you tune/tweak the kernel options for that? Details for those options can
be found at
http://www.postgresql.org/docs/8.3/static/kernel-resources.html#SYSVIPC
--
Shoaib Mir
http://shoaibmir.wordpress.com/
