"Ed L." <pgsql(at)bluepolka(dot)net> writes:
> FATAL: pre-existing shared memory block (key 9812001, ID 655374)
> is still in use
> However, ipcs shows there is no shared memory block in use:
What platform is that?
Perhaps you need some non-default switches to ipcs to see all memory
segments? Otherwise, it seems that either your kernel or ipcs is broken.
regards, tom lane