Re: The performance issues caused by upgrading PostgreSQL to version 16.3.

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

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