pgsql-bugs@postgresql.org writes:
> IpcMemoryCreate: memKey=155356396 , size=760632 ,
>         permission=384IpcMemoryCreate: shmget(..., create, ...)
>         failed: Invalid argument
This means that you don't have enough shared memory.  See FAQ.
--
Peter Eisentraut      peter_e@gmx.net       http://yi.org/peter-e/