diff -r 2c3cc4b01880 -r c16ac7a2eba4 src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecording.java
--- a/src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecording.java	Wed Oct 30 16:14:56 2019 +0100
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecording.java	Wed Oct 30 19:43:52 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -84,6 +84,7 @@
     private TimerTask startTask;
     private AccessControlContext noDestinationDumpOnExitAccessControlContext;
     private boolean shuoldWriteActiveRecordingEvent = true;
+    private Duration flushInterval = Duration.ofSeconds(1);
 
     PlatformRecording(PlatformRecorder recorder, long id) {
         // Typically the access control context is taken
@@ -98,9 +99,10 @@
         this.name = String.valueOf(id);
     }
 
-    public void start() {
+    public long start() {
         RecordingState oldState;
         RecordingState newState;
+        long startNanos = -1;
         synchronized (recorder) {
             oldState = getState();
             if (!Utils.isBefore(state, RecordingState.RUNNING)) {
@@ -111,7 +113,7 @@
                 startTask = null;
                 startTime = null;
             }
-            recorder.start(this);
+            startNanos = recorder.start(this);
             Logger.log(LogTag.JFR, LogLevel.INFO, () -> {
                 // Only print non-default values so it easy to see
                 // which options were added
@@ -143,6 +145,8 @@
             newState = getState();
         }
         notifyIfStateChanged(oldState, newState);
+
+        return startNanos;
     }
 
     public boolean stop(String reason) {
@@ -780,4 +784,28 @@
     public SafePath getDumpOnExitDirectory()  {
         return this.dumpOnExitDirectory;
     }
+
+    public void setFlushInterval(Duration interval) {
+        synchronized (recorder) {
+            if (getState() == RecordingState.CLOSED) {
+                throw new IllegalStateException("Can't set stream interval when recording is closed");
+            }
+            this.flushInterval = interval;
+        }
+    }
+
+    public Duration getFlushInterval() {
+        synchronized (recorder) {
+            return flushInterval;
+        }
+    }
+
+    public long getStreamIntervalMillis() {
+        synchronized (recorder) {
+            if (flushInterval != null) {
+                return flushInterval.toMillis();
+            }
+            return Long.MAX_VALUE;
+        }
+    }
 }