--- /dev/null	2019-07-25 13:07:35.456009699 +0200
+++ new/src/hotspot/share/memory/metaspace/constants.hpp	2019-07-25 15:30:08.853509816 +0200
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2018, 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
+ * 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_MEMORY_METASPACE_CONSTANTS_HPP
+#define SHARE_MEMORY_METASPACE_CONSTANTS_HPP
+
+#include "utilities/globalDefinitions.hpp"
+#include "memory/metaspace/chunkLevel.hpp"
+
+namespace metaspace {
+
+// Constants to be used throughout metaspace
+
+namespace constants {
+
+// Granularity, in bytes, metaspace is committed with.
+static const size_t commit_granule_bytes = K * 64;
+static const size_t commit_granule_words = commit_granule_bytes * BytesPerWord;
+
+
+// Whether or not commit new-born chunks thru after creation.
+static const bool newborn_chunks_are_fully_committed = true;
+
+// When a chunk is handed out by the ChunkManager to a class loader, how much
+// of a chunk should be committed up-front?
+// Size in words. Must be a multiple of commit_granule_words.
+// (Note: 0 is possible but inefficient, since it will cause the ClassLoaderMetaspace
+//        to commit the first granule right away anyway, so nothing is saved.
+//        chklvl::MAX_CHUNK_WORD_SIZE pretty much means every chunk is committed thru
+//        from the start.
+static const size_t committed_words_on_fresh_chunks = commit_granule_bytes * 2;
+
+// The default size of a non-class VirtualSpaceNode (unless created differently).
+// Must be a multiple of the root chunk size.
+static const size_t virtual_space_node_default_size = chklvl::MAX_CHUNK_BYTE_SIZE * 4;
+
+static const size_t allocation_from_dictionary_limit = 4 * K;
+
+} // namespace constants
+
+} // namespace metaspace
+
+#endif // SHARE_MEMORY_METASPACE_BLOCKFREELIST_HPP