Tom Lane schrieb:
>
> Had you been running the server for very long before forcing the error,
> I don't think this would have happened, because the buffer hashtable
> would have already expanded to its full working size.
Yes, you are right - this was a fresh started pgserver.
>
> Once we fix subxacts to not hold their XID locks after
> subcommit, the probability of a problem should go back down to the same
> low value that's allowed us to ignore this risk for the past many years.
>
I think so, too.
Daniel
