"Craig A. James" <cjames@modgraph-usa.com> writes:
> Is there no real-time garbage collection at all in Postgres?

No.

> And if so, is this because nobody has had time to implement garbage
> collection, or for a more fundamental reason, or because VACUUM is
> seen as sufficient?

If you really want to know, read the mountains of (mostly) junk that
have been written about replacing VACUUM in pgsql-hackers. The short
answer (with apologies to Winston Churchill) is that VACUUM is the worst
solution, except for all the others that have been suggested.

regards, tom lane

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