>> It is not because of the locks. There is only running transaction (and it >> got every locks). Not sure why the backend stucks there, seems it doesn't >> aware of the broken client. In normal situations, if you killed a client, >> then the server will print something like "could not receive data from >> client" then exit the backend. I tried to kill the process using pgAdmin Status page Cancel button. pgAdmin responds: A cancel signal was sent to the selected server process(es). However, process continues running. So it seems that child process does not respond to cancel signal from main process. I can reproduce this only in production database. I in test database it works OK. Andrus.
