Unable to allocate 2G of shared memory on wheezy

Here are my kernel settings

kernel.shmmax = 10737418240

# Maximum total size of all shared memory segments in pages (normally 4096
bytes)
kernel.shmall = 2621440
kernel.sem = 250 32000 32 1200

They are actually set...

sysctl -a | grep shm
kernel.shmmax = 10737418240
kernel.shmall = 2621440
kernel.shmmni = 4096

To reduce the request size [FAILently 2232950784 bytes), reduce
PostgreSQL's shared memory usage,

Dave Cramer