Hi, On 2023-02-13 12:52:23 -0500, Tom Lane wrote: > Andres Freund <and...@anarazel.de> writes: > > E.g. I fire of a query, it's slower than I'd like, I want to attach perf. Of > > course I can establish a separate connection, query pg_stat_activity there, > > and then perf. But that requires manually filtering pg_stat_activity to find > > the query. > > ... in this case, the problem is that the session is tied up doing the > slow query. You can't run "select pg_backend_pid()", but you can't > extract a psql variable value either. If you had the foresight to > set up a PROMPT, or to collect the PID earlier, you're good. But I'm > still not seeing where a psql variable makes that easier.
I guess you could argue that referencing BACKEND_PID in PROMPT would be more readable. But that's about it. Greetings, Andres Freund
