Thanks,
I do know about index options.
that table have NO (zero) indexes.
On Thu, May 11, 2023 at 4:48 PM Adam Scott <adam.c.scott@xxxxxxxxx> wrote:
Check the index creation has NULLS FIRST (or LAST) on both indexes that are used. Use explain to see what indexes are usedSee docs for create index: https://www.postgresql.org/docs/current/sql-createindex.htmlOn Thu, May 11, 2023, 7:30 AM Marc Millas <marc.millas@xxxxxxxxxx> wrote:Hi,I keep on investigating on the "death postgres" subjectbut open a new thread as I don't know if it's related to my pb.I have 2 different clusters, on 2 different machines, one is prod, the second test.Same data volumes.On prod if I doselect col_a, count(col_a) from table_a group by col_a order by col_a desc,I get the numbers of NULL on top.To get the number of NULL on top on the test db, I have toselect col_a, count(col_a) from table_a group by col_a order by col_a asc.so, it looks like there is something different within the b-tree operator class of varchar (?!?)between those 2 clusters.What can I check to to explain this difference as, to my understanding, it's not a postgresql.conf parameter.thanks
