>Julien Rouhaud <rjuju123@gmail.com> writes: >> On Mon, Jun 8, 2020 at 11:28 PM legrand legrand >> <legrand_legrand@hotmail.com> wrote: >>> pgbench -i postgres >>> pgbench -c20 -t5 postgres >>> generates the attached pgss_query_texts.stat, >>> where "BEGIN" and "UPDATE pgbench_accounts SET abalance = abalance + $1 WHERE aid = $2" >>> appears 20 times ...
>> Is the duplication only in the query text file? Looking at the code >> the query text part is stored holding a shared lwlock, so it seems >> like an expected behavior (less overhead but might store duplicated >> query text)
> I agree, this looks like operating-as-designed: different processes can > store the same query text and only later discover that they were creating > duplicate hash table entries. It's a bit surprising that the duplication > would be reproducible, but it just depends on timing. Maybe this is > telling us something about how scheduling works under MSYS2. > > regards, tom lane
Hello,
duplication is only in the query text file, selecting plans or calls in the view
pg_stat_statements are corrects.
For information, this is reproducable with official build
"PostgreSQL 12.1, compiled by Visual C++ build 1914, 64-bit"
