--- /dev/null	2020-09-04 12:37:41.765504620 +0200
+++ new/src/hotspot/share/memory/metaspace/msSettings.hpp	2020-09-04 13:58:07.561467953 +0200
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020 SAP SE. 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_MSSETTINGS_HPP
+#define SHARE_MEMORY_METASPACE_MSSETTINGS_HPP
+
+#include "memory/allocation.hpp"
+#include "memory/metaspace/msChunklevel.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+namespace metaspace {
+
+class Settings : public AllStatic {
+
+  // Granularity, in bytes, metaspace is committed with.
+  static size_t _commit_granule_bytes;
+
+  // Granularity, in words, metaspace is committed with.
+  static size_t _commit_granule_words;
+
+  // The default size of a non-class VirtualSpaceNode (unless created differently).
+  // Must be a multiple of the root chunk size.
+  static const size_t VirtualSpaceNodeDefaultWordSize = chunklevel::MAX_CHUNK_WORD_SIZE * 2; // lets go with 8mb virt size. Seems a good compromise betw. virt and mapping fragmentation.
+
+  // Alignment of the base address of a virtual space node
+  static const size_t VirtualSpaceNodeReserveAlignmentWordSize = chunklevel::MAX_CHUNK_WORD_SIZE;
+
+  // When allocating from a chunk, if the remaining area in the chunk is too small to hold
+  // the requested size, we attempt to double the chunk size in place...
+  static const bool EnlargeChunksInPlace = true;
+
+  // Whether or not chunks handed out to an arena start out fully committed;
+  // if true, this deactivates committing-on-demand (irregardless of whether
+  // we uncommit free chunks).
+  static bool _new_chunks_are_fully_committed;
+
+  // If true, chunks equal or larger than a commit granule are uncommitted
+  // after being returned to the freelist.
+  static bool _uncommit_free_chunks;
+
+  // If true, metablock allocations are guarded and periodically checked.
+  DEBUG_ONLY(static bool _use_allocation_guard;)
+
+  // If true, we handle deallocated blocks (default).
+  DEBUG_ONLY(static bool _handle_deallocations;)
+
+public:
+
+  static size_t commit_granule_bytes()                        { return _commit_granule_bytes; }
+  static size_t commit_granule_words()                        { return _commit_granule_words; }
+  static bool new_chunks_are_fully_committed()                { return _new_chunks_are_fully_committed; }
+  static size_t virtual_space_node_default_word_size()        { return VirtualSpaceNodeDefaultWordSize; }
+  static size_t virtual_space_node_reserve_alignment_words()  { return VirtualSpaceNodeReserveAlignmentWordSize; }
+  static bool enlarge_chunks_in_place()                       { return EnlargeChunksInPlace; }
+  static bool uncommit_free_chunks()                          { return _uncommit_free_chunks; }
+
+  static bool use_allocation_guard()                          { return DEBUG_ONLY(_use_allocation_guard) NOT_DEBUG(false); }
+  static bool handle_deallocations()                          { return DEBUG_ONLY(_handle_deallocations) NOT_DEBUG(true); }
+
+  static void ergo_initialize();
+
+  static void print_on(outputStream* st);
+
+};
+
+} // namespace metaspace
+
+#endif // SHARE_MEMORY_METASPACE_MSSETTINGS_HPP