Function BackoffSweeperMain

src/backend/postmaster/backoff.c:1200–1213

* This method is called after fork of the sweeper process. It sets up signal * handlers and does initialization that is required by a postgres backend. */

 * handlers and does initialization that is required by a postgres backend.
 */
void
BackoffSweeperMain(Datum main_arg)
{
	isSweeperProcess = true;

	/* We're now ready to receive signals */
	BackgroundWorkerUnblockSignals();

	/* main loop */
	BackoffSweeperLoop();

	/* One iteration done, go away */
	proc_exit(0);
}

/**
 * Main loop of the sweeper process. It wakes up once in a while, marks backends as active