Andreas Seltenreich writes: > Thomas Munro writes: > >> It is safe, as long as the segment remains mapped. Each backend that >> attaches calls LWLockRegisterTranche giving it the address of the name >> in its virtual address space. > > Hmok, I was under the impression only backends participating in the IPC > call the attach function, not necessarily the ones that could possible > want to resolve the wait_event_info they found in the procArray via > pgstat_get_wait_event().
Erm, ignore that question: They'll find a NULL in their LWLockTrancheArray and run into the "extension" case you mentioned. > But I really feel like I need to study the code a bit more before > commenting further… Following this advise now :-) regards, Andreas -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
