Re: icps, shmmax and shmall - Shared Memory tuning

So to return to my initial question.. Here's a summary
of the error message and my settings after the crash -

May 1 13:24:42 mito logger: IpcMemoryCreate:
shmget(key=5432001, size=140361728, 03600) failed:
Invalid argument
May 1 13:24:42 mito logger: This error usually means
that PostgreSQL's request for a shared memory
May 1 13:24:42 mito logger: segment exceeded your
kernel's SHMMAX parameter. You can either
May 1 13:24:42 mito logger: reduce the request size
or reconfigure the kernel with larger SHMMAX.
May 1 13:24:42 mito logger: To reduce the request
size (currently 140361728 bytes), reduce
May 1 13:24:42 mito logger: PostgreSQL's
shared_buffers parameter (currently 16384) and/or
May 1 13:24:42 mito logger: its max_connections
parameter (currently 256).

# sysctl kernel.shmmax
kernel.shmmax = 201326592

# sysctl kernel.shmall
kernel.shmall = 201326592

I've got 512MB RAM - what am I doing wrong? Postgres
consistently crashes (and subsequently takes the
machine down) on any heavy abuse.

Any other settings I should be looking at?

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