mjbjr@beaudesign.com writes:
> [postgres@localhost postgres]$ ipcrm shm 4224672
> shmctl : Identifier removed
> [postgres@localhost postgres]$ ipcs -m 4224672
> ((returns a ton of addr info))
The old postmaster may be gone, but what about child backends? I don't
think the shm segment will go away as long as any process holds it open.
Another theory is that you're misinvoking either ipcrm or ipcs. I know
the syntaxes you illustrate above don't work on my system ...
regards, tom lane