Mark Rae <m(dot)rae(at)inpharmatica(dot)co(dot)uk> writes:
> Normally the backend process would 'swap in' all 512M of shared
> memory when loading, but occasionally after dropping the previous
> database, the new backend would only seem to be able to use a
> small amount of the shared memory.
This is so vague that I'm not even sure what you're complaining about.
What do you mean by "only seem to be able to use a small amount of the
shared memory"?
regards, tom lane