$ postmaster -D /usr/share/postgresql/data/ -i
IpcMemoryCreate: shmget(key=5432001, size=1499136, 03600) failed: Not enough cor
e
This error usually means that PostgreSQL's request for a shared
memory segment exceeded available memory or swap space.
To reduce the request size (currently 1499136 bytes), reduce
PostgreSQL's shared_buffers parameter (currently 64) and/or
its max_connections parameter (currently 32).
The PostgreSQL Administrator's Guide contains more information about
shared memory configuration.