Nikolai Zhubr schrieb am 13.02.2017 um 23:03:
> Maybe I should have been more specific.
> What I need is debugging/profiling pure communication side of server
> operation, implying huge lots of requests and replies going over the
> wire to and from the server within some continued (valid) session,
> but so that the server is not actually doing anything above that (no
> sql, no locking, no synchronizing, zero usefull activity, just
> pumping network I/O)
>
If you are willing to drop the "no sql" requirement you could use something like
select rpad('*', 100000000, '*');
this will send a lot of data over the wire, the SQL overhead should be fairly small.
You can send more data if you combine that with e.g. generate_series()
