diff --git a/include/xo/arena/DArenaHashMap.hpp b/include/xo/arena/DArenaHashMap.hpp
index da0e742..c40f692 100644
--- a/include/xo/arena/DArenaHashMap.hpp
+++ b/include/xo/arena/DArenaHashMap.hpp
@@ -55,9 +55,11 @@ namespace xo {
 
         public:
             /** create hash map **/
-            DArenaHashMap(size_type hint_max_capacity,
+            DArenaHashMap(const std::string & name,
+                          size_type hint_max_capacity,
                           bool debug_flag = false);
-            DArenaHashMap(Hash && hash = Hash(),
+            DArenaHashMap(const std::string & name,
+                          Hash && hash = Hash(),
                           Equal && eq = Equal(),
                           size_type hint_max_capacity = 0,
                           bool debug_flag = false);
@@ -196,9 +198,10 @@ namespace xo {
         };
 
         template <typename Key, typename Value, typename Hash, typename Equal>
-        DArenaHashMap<Key, Value, Hash, Equal>::DArenaHashMap(size_type hint_max_capacity,
+        DArenaHashMap<Key, Value, Hash, Equal>::DArenaHashMap(const std::string & name,
+                                                              size_type hint_max_capacity,
                                                               bool debug_flag)
-        : DArenaHashMap(Hash(), Equal(), hint_max_capacity, debug_flag)
+        : DArenaHashMap(name, Hash(), Equal(), hint_max_capacity, debug_flag)
         {
         }
 
@@ -207,13 +210,14 @@ namespace xo {
          *   last 16 bytes will be copy of first 16 bytes
          */
         template <typename Key, typename Value, typename Hash, typename Equal>
-        DArenaHashMap<Key, Value, Hash, Equal>::DArenaHashMap(Hash && hash,
+        DArenaHashMap<Key, Value, Hash, Equal>::DArenaHashMap(const std::string & name,
+                                                              Hash && hash,
                                                               Equal && eq,
                                                               size_type hint_max_capacity,
                                                               bool debug_flag)
         : hash_{std::move(hash)},
           equal_{std::move(eq)},
-          store_{"arenahashmap", lub_exp2(lub_group_mult(hint_max_capacity))},
+          store_{name, lub_exp2(lub_group_mult(hint_max_capacity))},
           debug_flag_{debug_flag}
         {
         }
diff --git a/include/xo/arena/MemorySizeInfo.hpp b/include/xo/arena/MemorySizeInfo.hpp
index f12dcce..540453f 100644
--- a/include/xo/arena/MemorySizeInfo.hpp
+++ b/include/xo/arena/MemorySizeInfo.hpp
@@ -5,6 +5,7 @@
 
 #pragma once
 
+#include <functional>
 #include <string_view>
 #include <cstddef>
 
diff --git a/include/xo/arena/hashmap/HashMapStore.hpp b/include/xo/arena/hashmap/HashMapStore.hpp
index 22bfb12..3485022 100644
--- a/include/xo/arena/hashmap/HashMapStore.hpp
+++ b/include/xo/arena/hashmap/HashMapStore.hpp
@@ -32,11 +32,11 @@ namespace xo {
                   n_slot_{group_exp2.second * c_group_size},
                   control_{control_vector_type::map
                     (xo::mm::ArenaConfig{
-                        .name_ = name,
+                        .name_ = name + "-ctl",
                         .size_ = control_size(n_slot_)})},
                   slots_{slot_vector_type::map
                     (xo::mm::ArenaConfig{
-                        .name_ = name,
+                        .name_ = name + "-slots",
                         .size_ = n_slot_ * sizeof(value_type)})}
                 {
                     /* here: arenas have allocated address range, but no committed memory yet */
diff --git a/src/arena/DCircularBuffer.cpp b/src/arena/DCircularBuffer.cpp
index 667126a..372462f 100644
--- a/src/arena/DCircularBuffer.cpp
+++ b/src/arena/DCircularBuffer.cpp
@@ -75,7 +75,7 @@ namespace xo {
           mapped_range_{reserved_range_.prefix(0)},
           occupied_range_{mapped_range_.prefix(0)},
           input_range_{occupied_range_.prefix(0)},
-          pinned_spans_{}
+          pinned_spans_{DArenaVector<span_type>::map(ArenaConfig().with_name(config.name_ + "-pins"))}
         {
         }
 
diff --git a/utest/DArenaHashMap.test.cpp b/utest/DArenaHashMap.test.cpp
index bc672c8..02ac3fc 100644
--- a/utest/DArenaHashMap.test.cpp
+++ b/utest/DArenaHashMap.test.cpp
@@ -24,7 +24,7 @@ namespace xo {
         {
             using HashMap = DArenaHashMap<int, int>;
 
-            HashMap map;
+            HashMap map("utest");
 
             REQUIRE(map.empty());
             REQUIRE(map.size() == 0);
@@ -36,7 +36,7 @@ namespace xo {
         {
             using HashMap = DArenaHashMap<int, int>;
 
-            HashMap map(257);
+            HashMap map("utest", 257);
 
             REQUIRE(map.empty());
             REQUIRE(map.size() == 0);
@@ -49,7 +49,7 @@ namespace xo {
         {
             using HashMap = DArenaHashMap<int, int>;
 
-            HashMap map;
+            HashMap map("utest");
 
             REQUIRE(map.empty());
             REQUIRE(map.size() == 0);
@@ -209,7 +209,7 @@ namespace xo {
              */
 
             for (std::uint32_t n = 0; n <= 8; ) {
-                HashMap hash_map;
+                HashMap hash_map("utest");
 
                 auto test_fn = [&rgen, &hash_map](bool dbg_flag,
                                                   std::uint32_t n)
@@ -245,7 +245,7 @@ namespace xo {
 
             using HashMap = DArenaHashMap<int, int>;
 
-            HashMap map;
+            HashMap map("utest");
 
             // copy keys here so we can print stuff
             std::vector<int> key_v;
@@ -336,7 +336,7 @@ namespace xo {
         {
             using HashMap = DArenaHashMap<std::string_view, int>;
 
-            HashMap map(1024);
+            HashMap map("utest", 1024);
 
             REQUIRE(map.verify_ok());