On Mon, Sep 12, 2022 at 05:34:37PM +0100, Matheus Martin wrote: > Understood. I have run a prepared statement with the query in question > through `psql` and JIT was not used (see plan below), however please note > that the long response times were never reproducible from `psql`, they only > happen from our JDBC application. Do you have pg_stat_statements enabled? If yes you could check what are the maximum execution and planning time for that query, which may give an answer.