--- /dev/null	2019-02-13 16:01:02.292000000 +0300
+++ new/src/share/vm/jfr/recorder/service/jfrMemorySizer.hpp	2019-02-15 19:03:20.821319833 +0300
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2012, 2018, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_JFR_RECORDER_SERVICE_JFRMEMORYSIZER_HPP
+#define SHARE_VM_JFR_RECORDER_SERVICE_JFRMEMORYSIZER_HPP
+
+#include "memory/allocation.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+extern const julong MIN_BUFFER_COUNT;
+extern const julong MIN_GLOBAL_BUFFER_SIZE;
+extern const julong MIN_MEMORY_SIZE;
+extern const julong MIN_THREAD_BUFFER_SIZE;
+
+struct JfrMemoryOptions {
+  julong memory_size;
+  julong global_buffer_size;
+  julong buffer_count;
+  julong thread_buffer_size;
+  bool memory_size_configured;
+  bool global_buffer_size_configured;
+  bool buffer_count_configured;
+  bool thread_buffer_size_configured;
+};
+
+//
+// Encapsulates sizing of memory options
+// The options parameter is modified with updated values.
+//
+class JfrMemorySizer : AllStatic {
+ public:
+  static bool adjust_options(JfrMemoryOptions* options);
+};
+
+#endif // SHARE_VM_JFR_RECORDER_SERVICE_JFRMEMORYSIZER_HPP