Robert Haas <robertmhaas@gmail.com> writes:
> On Wed, Oct 21, 2009 at 12:27 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> The post-connect SET still seems like the best choice to me.
> Are we really thinking about interposing an additional server
> round-trip on every connection for such a marginal feature (to
> paraphrase yourself)? That doesn't seem like a good trade-off.
Only connections that are actually using the feature. It doesn't
bother me that much --- before 7.4 we had *multiple* round trips
involved in a connection start, and anyway backend startup is a
pretty dang heavyweight operation.
If you are concerned about that you should certainly not be advocating
multiple connection tries instead. That's a lot of round trips too,
plus you are paying repeated fork and backend-startup overhead.
regards, tom lane