Hi, On Sun, Jun 04, 2023 at 02:04:52PM +0530, Satalabaha Postgres wrote: > > DB : postgres 14. > > We are experiencing weird performance issue of one simple insert statement > taking several minutes to insert data. The application calls insert > statement via stored procedure show mentioned below. > > The select query in the insert returns about 499 rows. However, this insert > statement when executed from application user i.e. schema1_u takes close to > 8 minutes. When the same insert statement gets executed as postgres user > it takes less than 280 ms. Both the executions use the same execution plan > with only difference that when schema1_u executes the SQL, we observe > "Trigger for constraint fk_con_tablea: time=426499.314 calls=499" taking > more time. Both the parent and child tables are not big in size. There is > no table bloat etc for both of these tables. Below are the details. > Is there any way we can identify why as postgres user the insert statement > works fine and why not with application user schema1_u? Are you sure that in both case the exact same tables are accessed? It looks like schema1_u is checking the rows for a way bigger table. The usual answer is to create a proper index for the table referenced by the FK.
