diff --git a/xo-arena/include/xo/arena/DArenaHashMap.hpp b/xo-arena/include/xo/arena/DArenaHashMap.hpp
index da0e742a..c40f6926 100644
--- a/xo-arena/include/xo/arena/DArenaHashMap.hpp
+++ b/xo-arena/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/xo-arena/include/xo/arena/MemorySizeInfo.hpp b/xo-arena/include/xo/arena/MemorySizeInfo.hpp
index f12dcce5..540453fd 100644
--- a/xo-arena/include/xo/arena/MemorySizeInfo.hpp
+++ b/xo-arena/include/xo/arena/MemorySizeInfo.hpp
@@ -5,6 +5,7 @@
 
 #pragma once
 
+#include <functional>
 #include <string_view>
 #include <cstddef>
 
diff --git a/xo-arena/include/xo/arena/hashmap/HashMapStore.hpp b/xo-arena/include/xo/arena/hashmap/HashMapStore.hpp
index 22bfb120..34850222 100644
--- a/xo-arena/include/xo/arena/hashmap/HashMapStore.hpp
+++ b/xo-arena/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/xo-arena/src/arena/DCircularBuffer.cpp b/xo-arena/src/arena/DCircularBuffer.cpp
index 667126af..372462f4 100644
--- a/xo-arena/src/arena/DCircularBuffer.cpp
+++ b/xo-arena/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/xo-arena/utest/DArenaHashMap.test.cpp b/xo-arena/utest/DArenaHashMap.test.cpp
index bc672c8b..02ac3fc3 100644
--- a/xo-arena/utest/DArenaHashMap.test.cpp
+++ b/xo-arena/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());
 
diff --git a/xo-expression2/src/expression2/StringTable.cpp b/xo-expression2/src/expression2/StringTable.cpp
index 174c9e9f..2d23d03e 100644
--- a/xo-expression2/src/expression2/StringTable.cpp
+++ b/xo-expression2/src/expression2/StringTable.cpp
@@ -19,7 +19,7 @@ namespace xo {
                                  bool debug_flag)
         : strings_{DArena::map(ArenaConfig{.name_ = "strings",
                                            .size_ = hint_max_capacity})},
-          map_{hint_max_capacity}
+          map_{"stringkeys", hint_max_capacity}
         {
             (void)debug_flag;
         }
diff --git a/xo-reader2/include/xo/reader2/ReaderConfig.hpp b/xo-reader2/include/xo/reader2/ReaderConfig.hpp
index 5b02e62c..62e0e758 100644
--- a/xo-reader2/include/xo/reader2/ReaderConfig.hpp
+++ b/xo-reader2/include/xo/reader2/ReaderConfig.hpp
@@ -28,7 +28,7 @@ namespace xo {
             bool tk_debug_flag_ = false;
 
             /** arena configuration for parser stack **/
-            ArenaConfig parser_arena_config_ { .name_ = "parer-arena",
+            ArenaConfig parser_arena_config_ { .name_ = "parser-arena",
                                                .size_ = 2*1024*1024,
                                                .hugepage_z_ = 2*1024*1024,
                                                .store_header_flag_ = false,