On Sat, 2023-11-04 at 19:08 +0000, Abraham, Danny wrote: > Asking for help with a JDBC related issue. > Environment: Linux 7.9 PG 14.9 , very busy PG Server. > > A big query - 3 unions and about 10 joins runs : > - 70ms on psql , DBeaver with JDBC 42 and in our Server using old JDBC 9.2 > - 2500 ms in our Server using new JDBC 42 driver. ( and this is running many times) > > Question: Is there a structured way to identify optimization setup ( Planner Method s ) changes? > Are there any known changes specific to JDBC 42. What I would do is enable auto_explain and look at the execution plan when the statement is run by the JDBC driver. Then you can compare the execution plans and spot the difference. Yours, Laurenz Albe
