It is called by a special child process of the postmaster after a signal. Search for PMSIGNAL_DO_CHECKPOINT in xlog.c and in postmaster.c. The checkpoint process gets started out of sigusr1_handler().
On Sat, 2002-08-31 at 23:27, Bruce Momjian wrote: > I am trying to find when WAL log files are rotated. The message is: > > 2002-02-11 21:18:13 DEBUG: recycled transaction log file 0000000000000005 > > and it is printed in MoveOfflineLogs(), and MoveOfflineLogs() is only > called by CreateCheckPoint(), but I can't see where CreateCheckPoint() > is called in normal operation. I see it called by CHECKPOINT, and on > startup and shutdown, and from bootstrap, but where is it called during > normal backend operation. > > -- > Bruce Momjian | http://candle.pha.pa.us > [EMAIL PROTECTED] | (610) 359-1001 > + If your life is a hard drive, | 13 Roberts Road > + Christ can be your backup. | Newtown Square, Pennsylvania 19073 > > ---------------------------(end of broadcast)--------------------------- > TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED]) > -- J. R. Nield [EMAIL PROTECTED] ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster