On Mon, 2025-02-17 at 07:55 +0000, 馬 騰飛 wrote: > I am reaching out to seek your technical assistance regarding a performance > issue we encountered after upgrading our PostgreSQL version from 12.19 to 16.3. > We have noticed a significant performance problem with a specific SQL query on > one of our application screens. > Interestingly, when we isolate the problematic SQL statement and replace its > parameters with actual values, it executes in just a few seconds in pgAdmin. > However, when we run the same SQL query through our application using Npgsql, > it takes over ten minutes to complete. I recommend using the auto_explain module to capture the plan of the statement when the application executes it. You best write the fast and the slow plan to the list, in plain text. Yours, Laurenz Albe -- *E-Mail Disclaimer* Der Inhalt dieser E-Mail ist ausschliesslich fuer den bezeichneten Adressaten bestimmt. Wenn Sie nicht der vorgesehene Adressat dieser E-Mail oder dessen Vertreter sein sollten, so beachten Sie bitte, dass jede Form der Kenntnisnahme, Veroeffentlichung, Vervielfaeltigung oder Weitergabe des Inhalts dieser E-Mail unzulaessig ist. Wir bitten Sie, sich in diesem Fall mit dem Absender der E-Mail in Verbindung zu setzen. *CONFIDENTIALITY NOTICE & DISCLAIMER *This message and any attachment are confidential and may be privileged or otherwise protected from disclosure and solely for the use of the person(s) or entity to whom it is intended. If you have received this message in error and are not the intended recipient, please notify the sender immediately and delete this message and any attachment from your system. If you are not the intended recipient, be advised that any use of this message is prohibited and may be unlawful, and you must not copy this message or attachment or disclose the contents to any other person.
