On Tue, Aug 11, 2009 at 3:42 PM, Benjamin Krajmalnik <k...@illumen.com>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 Vshared 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/
