diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index b1e2d94951..03d191dfe6 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -386,6 +386,8 @@ static void pgstat_recv_connstat(PgStat_MsgConn *msg, int len);
 static void pgstat_recv_replslot(PgStat_MsgReplSlot *msg, int len);
 static void pgstat_recv_tempfile(PgStat_MsgTempFile *msg, int len);
 
+static void SignalPgstatHandlerForCrashExit(SIGNAL_ARGS);
+
 /* ------------------------------------------------------------
  * Public functions called from postmaster follow
  * ------------------------------------------------------------
@@ -725,6 +727,8 @@ pgstat_reset_remove_files(const char *directory)
 		snprintf(fname, sizeof(fname), "%s/%s", directory,
 				 entry->d_name);
 		unlink(fname);
+
+		elog(DEBUG2, "removing stats file \"%s\"", fname);
 	}
 	FreeDir(dir);
 }
@@ -4821,13 +4825,13 @@ PgstatCollectorMain(int argc, char *argv[])
 
 	/*
 	 * Ignore all signals usually bound to some action in the postmaster,
-	 * except SIGHUP and SIGQUIT.  Note we don't need a SIGUSR1 handler to
-	 * support latch operations, because we only use a local latch.
+	 * except SIGHUP, SIGTERM and SIGQUIT.  Note we don't need a SIGUSR1
+	 * handler to support latch operations, because we only use a local latch.
 	 */
 	pqsignal(SIGHUP, SignalHandlerForConfigReload);
 	pqsignal(SIGINT, SIG_IGN);
-	pqsignal(SIGTERM, SIG_IGN);
-	pqsignal(SIGQUIT, SignalHandlerForShutdownRequest);
+	pqsignal(SIGTERM, SignalHandlerForShutdownRequest);
+	pqsignal(SIGQUIT, SignalPgstatHandlerForCrashExit);
 	pqsignal(SIGALRM, SIG_IGN);
 	pqsignal(SIGPIPE, SIG_IGN);
 	pqsignal(SIGUSR1, SIG_IGN);
@@ -4852,8 +4856,8 @@ PgstatCollectorMain(int argc, char *argv[])
 	AddWaitEventToSet(wes, WL_SOCKET_READABLE, pgStatSock, NULL, NULL);
 
 	/*
-	 * Loop to process messages until we get SIGQUIT or detect ungraceful
-	 * death of our parent postmaster.
+	 * Loop to process messages until we get SIGTERM or SIGQUIT of our parent
+	 * postmaster.
 	 *
 	 * For performance reasons, we don't want to do ResetLatch/WaitLatch after
 	 * every message; instead, do that only after a recv() fails to obtain a
@@ -4871,7 +4875,7 @@ PgstatCollectorMain(int argc, char *argv[])
 		ResetLatch(MyLatch);
 
 		/*
-		 * Quit if we get SIGQUIT from the postmaster.
+		 * Quit if we get SIGTERM from the postmaster.
 		 */
 		if (ShutdownRequestPending)
 			break;
@@ -7458,3 +7462,17 @@ pgstat_count_slru_truncate(int slru_idx)
 {
 	slru_entry(slru_idx)->m_truncate += 1;
 }
+
+/*
+ * Simple signal handler for handling SIGQUIT to exit quickly without
+ * doing any additional works, for example writing stats files.
+ */
+static void
+SignalPgstatHandlerForCrashExit(SIGNAL_ARGS)
+{
+	/*
+	 * We arrange to do _exit(1) because the stats collector doesn't touch
+	 * shared memory.
+	 */
+	_exit(1);
+}
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 6436ae0f48..b9ca39ef95 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -3084,7 +3084,7 @@ reaper(SIGNAL_ARGS)
 				 * nothing left for it to do.
 				 */
 				if (PgStatPID != 0)
-					signal_child(PgStatPID, SIGQUIT);
+					signal_child(PgStatPID, SIGTERM);
 			}
 			else
 			{