On Mon, May 17, 2010 at 10:20 PM, Robert Haas <robertmh...@gmail.com> wrote: > OK, I think I understand now. But, the SIGTERM sent by the postmaster > doesn't kill the recovery process unconditionally. It will invoke > StartupProcShutdownHandler(), which will set set shutdown_requested = > true. That gets checked by RestoreArchivedFile() and > HandleStartupProcInterrupts(), and I think that neither of those can > get invoked until after the control file has been updated. Do you see > a way it can happen?
Yeah, the way is: StartupXLOG() --> ReadCheckpointRecord() --> ReadRecord() --> XLogPageRead() --> XLogFileReadAnyTLI() --> XLogFileRead() --> RestoreArchivedFile() ReadCheckpointRecord() is called before pg_control is updated. ISTM that walreceiver might be invoked even after shutdown is requested. We should prevent the postmaster from starting up walreceiver if Shutdown > NoShutdown? Regards, -- Fujii Masao NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
