On 10/10/2022 17:53, Tom Lane wrote:
> Kostas Papadopoulos <kostas@methodosit.com.cy> writes:
>> I cannot see how it can be configuration since the two databases are in the same
>> Postgres instance.
>
> There is such a thing as ALTER DATABASE ... SET to install different
> settings at the per-database level.
I understand, but I created the databases to be the same. Our original problem was
that developers' workstations (Debian and Windows) were running a specific query
different from a test db (Ubuntu). After eliminating everything we thought of (data,
versions, configurations, OS, etc) we ended up with the scenario I described here.
>
> In general, the answer to your question is that the databases are
> *not* identical. You just haven't figured out how yet. I'm wondering
> if it has something to do with the dump/reload having compacted out
> bloat in the tables or indexes, causing cost estimates to change.
I will look into that and a couple of other ideas I got from this list.
>
> regards, tom lane
Thanks
kostas