--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -67,7 +67,7 @@ int            BgWriterDelay = 200;
   * Interval in which standby snapshots are logged into the WAL stream, in
   * milliseconds.
   */
-#define LOG_SNAPSHOT_INTERVAL_MS 15000
+#define LOG_SNAPSHOT_INTERVAL_MS 1

  /*
   * LSN and timestamp at which we last issued a LogStandbySnapshot(), to avoid
@@ -306,7 +306,7 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
           */
          rc = WaitLatch(MyLatch,
                         WL_LATCH_SET | WL_TIMEOUT | WL_EXIT_ON_PM_DEATH,
-                       BgWriterDelay /* ms */ , WAIT_EVENT_BGWRITER_MAIN);
+                       1 /* ms */ , WAIT_EVENT_BGWRITER_MAIN);

          /*
           * If no latch event and BgBufferSync says nothing's happening, extend
@@ -339,6 +339,5 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
              StrategyNotifyBgWriter(-1);
          }

-        prev_hibernate = can_hibernate;
      }
  }