diff --git a/src/vault/mem/local-buffer-store.hpp b/src/vault/mem/local-buffer-store.hpp
index afbff2ff1..a35dd91a8 100644
--- a/src/vault/mem/local-buffer-store.hpp
+++ b/src/vault/mem/local-buffer-store.hpp
@@ -51,6 +51,12 @@
 namespace vault {
 namespace mem   {
   
+  namespace { // tuning parameters for clean-up heuristics
+    
+    const double TRIGGER_SENSITIVIY = 1.0;  ///< sensitivity of re-triggering based on max-score and turnover
+    const double HEURISTIC_CLEANUP  = 0.5;  ///< cut-off percentage of max-score; blocks with lower score will be sent back
+  }
+  
   using util::_Fmt;
   
   class LocalStoreDiagnostic;
@@ -73,16 +79,28 @@ namespace mem   {
    * This implementation of the BufferProvider::BufferStore interface
    * deliberately skips further sanity checks, beyond what is enforced
    * through the BufferMetadata lifecycle. Allocation requests are
-   * passed to the LocalMemPool for the current thread.
+   * delegated to the LocalMemPool for the current thread.
+   * 
+   * The PoolSetup creates a connection to the EngineBufferManager,
+   * retrieved via lib::Depend, so each thread-local pool can unwind
+   * automatically at thread end and return all leased storage.
    */
   class LocalBufferStore
     : public BufferProviderSetup::Store
     {
-      struct SetupPool;
-      using LocalPool = lib::LocalSlice<LocalMemPool, SetupPool>;
+      struct PoolSetup;
+      using LocalPool = lib::LocalSlice<LocalMemPool, PoolSetup>;
       using GlobalPool = lib::Depend<EngineBufferManager>;
       
-      struct SetupPool
+      static void
+      send_back2globalPool (Buff* mem, size_t siz)
+        {
+          Alloc alloc{mem,siz};
+          GlobalPool globalPool;
+          globalPool().supply(alloc);
+        }
+      
+      struct PoolSetup
         {
           using Service = LocalMemPool;
           
@@ -91,12 +109,7 @@ namespace mem   {
             {
               return LocalMemPool{[](LocalMemPool& pool2close)
                                     {
-                                      pool2close.purge([](Buff* mem, size_t siz)
-                                                        {
-                                                          Alloc alloc{mem,siz};
-                                                          GlobalPool globalPool;
-                                                          globalPool().supply(alloc);
-                                                        });
+                                      pool2close.purge (send_back2globalPool);
                                     }};
             }
         };
@@ -105,8 +118,7 @@ namespace mem   {
       GlobalPool globalPool_;
       
     public:
-      LocalBufferStore()
-        { }
+      LocalBufferStore() { }
       
       
       
@@ -191,15 +203,19 @@ namespace mem   {
         auto& [storage,buffSiz,specifics] = storageSlot;
         REQUIRE (storage);
         localPool_->reSupply (storage);
-        /////////////////////////////////////////////////////OOO trigger heuristic clean-up here
+        if (localPool_->shouldCleanup (TRIGGER_SENSITIVIY))
+          localPool_->cleanup (HEURISTIC_CLEANUP
+                              ,send_back2globalPool);
       }
       
+      
     private:
       /** diagnostic access for unit testing */
       friend PoolDiagnostic watch (LocalBufferStore const&);
     };
   
   
+  
   /** entrance point to inspection for test */
   inline PoolDiagnostic
   watch (LocalBufferStore const& lstor)
diff --git a/src/vault/mem/local-mem-pool.hpp b/src/vault/mem/local-mem-pool.hpp
index 849d689b2..546cce0f6 100644
--- a/src/vault/mem/local-mem-pool.hpp
+++ b/src/vault/mem/local-mem-pool.hpp
@@ -205,9 +205,9 @@ namespace mem   {
       
       /** turnover-based trigger for heuristic pool clean-up */
       bool
-      shouldCleanup (float sharpen =1.0f)  const
+      shouldCleanup (double sharpen =1.0f)  const
         {
-          return turnover_ * float(MATCH_SCORE) <= maxScore_ * sharpen;
+          return turnover_ * double(MATCH_SCORE) <= maxScore_ * sharpen;
         }
       
       /**
diff --git a/tests/vault/mem/local-buffer-store-test.cpp b/tests/vault/mem/local-buffer-store-test.cpp
index fbfaa60ee..45888731f 100644
--- a/tests/vault/mem/local-buffer-store-test.cpp
+++ b/tests/vault/mem/local-buffer-store-test.cpp
@@ -24,7 +24,6 @@
 #include "lib/depend-inject.hpp"
 #include "lib/thread.hpp"
 #include "lib/util.hpp"
-#include "test/diagnostic-output.hpp"///////////////////////TODO
 
 #include <algorithm>
 #include <atomic>
@@ -40,28 +39,11 @@ namespace vault {
 namespace mem   {
 namespace test  {
   
-//  using LERR_(LOGIC);
-//  using LERR_(LIFECYCLE);
   
   
-  namespace { // Test helper
-    
-//    template<typename X>
-//    Buff*
-//    mark_as_Buffer(X& something)
-//      {
-//        return reinterpret_cast<Buff*> (std::addressof(something));
-//      }
-//    
-  }
-  
-  
-  
-  
-  
-  
-  /**************************************************************************//**
-   * @test verify worker memory handling that relies on a thread-local allocator.
+  /*********************************************//**
+   * @test verify memory handling in worker
+   *  that relies on a thread-local allocation pool.
    */
   class LocalBufferStore_test : public Test
     {
@@ -69,8 +51,6 @@ namespace test  {
       virtual void
       run (Arg)
         {
-//          seedRand();
-          
           verify_API();
           verify_announce();
           verify_allocate();
@@ -372,7 +352,7 @@ namespace test  {
       /** @test heuristic clean-up after releasing several allocations
        *      - at first, a de-allocated block remains available in the local pool
        *      - after a number of usages, defined as _turnover_, clean-up is triggered
-       *      - this test scenario requests 3 buffers, but repeatedly uses only one
+       *      - this test scenario requests 5 buffers, but repeatedly uses only one
        *      - after the third round with this usage pattern, the local pool is reduced
        */
       void
@@ -394,7 +374,7 @@ namespace test  {
           Thread testWorker{[&] /* === Scenario: test subject requests allocation immediately === */
                               {
                                 // Step-1 : first round
-                                uint avail = storeAPI.prepareBuffers(TYPEID, 3, BUFFSIZ);
+                                uint avail = storeAPI.prepareBuffers(TYPEID, 5, BUFFSIZ);
                                 CHECK (0 == avail);
                                 CHECK (watch(localStore).isEmpty());
                                 
@@ -403,36 +383,40 @@ namespace test  {
                                 CHECK (storage);
                                 
                                 storeAPI.detachBuffer (TYPEID, slot1);
-                                // Result: got three allocations and all three are in the local pool
-                                CHECK (watch(localStore).size()    == 3);
-                                CHECK (watch(localStore).cntFree() == 3);
+                                // Result: got five allocations and all are in the local pool
+                                CHECK (watch(localStore).size()    == 5);
+                                CHECK (watch(localStore).cntFree() == 5);
                                 
                                 ++step;
-                                // Step-2 : repeat same pattern
+                                // Step-2 : repeat same pattern -- again only using one of the five buffers
                                 BuffAlloc slot2 = storeAPI.provideBuffer (TYPEID, BUFFSIZ, 0,0);
                                 CHECK (slot2 == slot1);
-                                CHECK (watch(localStore).size()    == 3);
-                                CHECK (watch(localStore).cntFree() == 2);
+                                CHECK (watch(localStore).size()    == 5);
+                                CHECK (watch(localStore).cntFree() == 4);
 
                                 storeAPI.detachBuffer (TYPEID, slot1);
-                                CHECK (watch(localStore).size()    == 3);
-                                CHECK (watch(localStore).cntFree() == 3);
+                                CHECK (watch(localStore).size()    == 5);
+                                CHECK (watch(localStore).cntFree() == 5);
 
                                 ++step;
                                 // Step-3 : repeat for a third time
                                 BuffAlloc slot3 = storeAPI.provideBuffer (TYPEID, BUFFSIZ, 0,0);
                                 CHECK (slot3 == slot1);
-                                CHECK (watch(localStore).size()    == 3);
-                                CHECK (watch(localStore).cntFree() == 2);
+                                CHECK (watch(localStore).size()    == 5);
+                                CHECK (watch(localStore).cntFree() == 4);
 
                                 storeAPI.detachBuffer (TYPEID, slot1);
-                                // this completed a "turnover" of three buffers
-                                SHOW_EXPR(watch(localStore).size());
+                                // this triggered a clean-up and detected the unused capacity
+                                CHECK (watch(localStore).size()    == 1);
+                                CHECK (watch(localStore).cntFree() == 1);
 
                                 ++step;
                                 // main thread will now see the partial clean-up
                                 
-                              }}; // block automatically sent back after thread end
+                                while (step == 4) // wait until main thread could investigate
+                                  sleep_for(1ms);
+                                
+                              }}; // remaining buffer automatically sent back after thread end
           
           
           /* === Main thread: observe effects in the global pool === */
@@ -440,19 +424,31 @@ namespace test  {
           // wait until Step-2
           while (step < 2)
             sleep_for(1ms);
-          CHECK (watch(*globalPool).numAllocs() == 3);
+          CHECK (watch(*globalPool).numAllocs() == 5);
           
           // re-check after Step-2
           while (step <= 2)
             sleep_for(1ms);
           // nothing changed; local pool operates independently
-          CHECK (watch(*globalPool).numAllocs() == 3);
+          CHECK (watch(*globalPool).numAllocs() == 5);
+          CHECK (watch(*globalPool).bytesLeased() == 5*BUFFSIZ);
           
           // re-check after Step-3
           while (step <= 3)
             sleep_for(1ms);
           globalPool->processPendingRequests();
-          SHOW_EXPR(watch(*globalPool).numAllocs())
+          CHECK (watch(*globalPool).bytesLeased() == 1*BUFFSIZ);
+          // Note: local pool sent back excess capacity
+          
+          ++step; // allow the worker to terminate after that
+          
+          while (testWorker)
+            sleep_for(1ms);
+          sleep_for(1ms); // additional wait for the dtor
+          
+          globalPool->processPendingRequests();
+          CHECK (watch(*globalPool).bytesLeased() == 0);
+          // all capacity properly returned into global pool
         }
     };
   
diff --git a/tests/vault/mem/local-mem-pool-test.cpp b/tests/vault/mem/local-mem-pool-test.cpp
index b17798a47..f5f1f12a4 100644
--- a/tests/vault/mem/local-mem-pool-test.cpp
+++ b/tests/vault/mem/local-mem-pool-test.cpp
@@ -306,6 +306,7 @@ namespace test  {
       
       
       
+      
       /** @test heuristic trigger mechanism for pool clean-up
        *      - use a setup where the global pool is just a queue of buffer pointers
        *      - create abbreviated notation to play through various scenarios
@@ -377,208 +378,199 @@ namespace test  {
                     .feed(MEM32)
                     .feed(MEM33);
           
-SHOW_EXPR(show(globalPool));
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          
+          CHECK (0 == watch(pool).size() );
+          CHECK (0 == watch(pool).getTurnover() );
           
           supply(3);
-          
-SHOW_EXPR("supply")
-SHOW_EXPR(show(globalPool));
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-          
           reserve(2);
           
-SHOW_EXPR("reserve")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK (3 == watch(pool).size() );
+          CHECK (3 == watch(pool).cntFree() );
+          CHECK (2 == watch(pool).cntResd() );
+          CHECK (1 == watch(pool).getMaxScore() );
+          CHECK (3 == watch(pool).getTurnover() );
           
+          
+          //------------ PATTERN-1 : use complete local capacity
           claim(3);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(usedBuff));
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 0 == watch(pool).cntFree() );
+          CHECK ( 0 == watch(pool).cntResd() );
+          CHECK (10 == watch(pool).getMaxScore() );
+          CHECK ( 3 == watch(pool).getTurnover() );
           
           free(3);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(usedBuff));
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 3 == watch(pool).cntFree() );
+          CHECK (10 == watch(pool).getMaxScore() );
+          CHECK ( 0 == watch(pool).getTurnover() );
 
-SHOW_EXPR(pool.shouldCleanup())
+          // heuristic trigger fires at that point,
+          // since full capacity was »turned over« once
+          CHECK (pool.shouldCleanup() );
           
           uint removed = pool.cleanup(0.5, pushMem);
-SHOW_EXPR(removed)
+          // However, nothing was removed, since all elements
+          // were used efficiently and are thus close to maxScore
+          CHECK (0 == removed);
+          CHECK (show(globalPool) == "21, 31, 32, 33"_expect);
           
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(globalPool));
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 5 == watch(pool).getMaxScore() );
+          // turnover is re-set to current pool size
+          CHECK ( 3 == watch(pool).getTurnover() );
           
+          
+          //------------ PATTERN-2 : use only one buffer a time (inefficient)
           claim(1);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 2 == watch(pool).cntFree() );
+          CHECK (15 == watch(pool).getMaxScore() );
+          CHECK ( 3 == watch(pool).getTurnover() );
           
           free(1);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 3 == watch(pool).cntFree() );
+          CHECK (15 == watch(pool).getMaxScore() );
+          CHECK ( 2 == watch(pool).getTurnover() );
 
-SHOW_EXPR(pool.shouldCleanup())
+          // not yet hitting the trigger...
+          CHECK (not pool.shouldCleanup() );
           
           claim(1);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 2 == watch(pool).cntFree() );
+          CHECK (25 == watch(pool).getMaxScore() );
+          CHECK ( 2 == watch(pool).getTurnover() );
           
           free(1);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 3 == watch(pool).size() );
+          CHECK ( 3 == watch(pool).cntFree() );
+          CHECK (25 == watch(pool).getMaxScore() );
+          CHECK ( 1 == watch(pool).getTurnover() );
 
-SHOW_EXPR(pool.shouldCleanup())
+          // maxScore did increase a lot,
+          // since effectively just a single buffer was used all the time
+          
+          CHECK (pool.shouldCleanup() );
           
           removed = pool.cleanup(0.5, pushMem);
-SHOW_EXPR(removed)
+          // Consequently the two superfluous buffers will be sent back
+          // (cutoff-score is at 12; maxScore will be lowered by that amount afterwards)
+          CHECK (2 == removed );
+          CHECK (show(globalPool) == "21, 31, 32, 33, 12, 11"_expect);
+
+          CHECK ( 1 == watch(pool).size() );
+          CHECK ( 1 == watch(pool).cntFree() );
+          CHECK (13 == watch(pool).getMaxScore() );
+          CHECK ( 1 == watch(pool).getTurnover() );
           
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(globalPool));
           
+          //------------ PATTERN-3 : dynamic partially overlapping usage
           supply(4);
-SHOW_EXPR("supply")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(globalPool));
+          
+          CHECK ( 5 == watch(pool).size() );
+          CHECK ( 5 == watch(pool).cntFree() );
+          CHECK (13 == watch(pool).getMaxScore() );
+          CHECK ( 5 == watch(pool).getTurnover() );
+          // turnover was bumped +4 due to increased supply
           
           claim(3);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 5 == watch(pool).size() );
+          CHECK ( 2 == watch(pool).cntFree() );
+          CHECK (13 == watch(pool).getMaxScore() );
+          CHECK ( 5 == watch(pool).getTurnover() );
           
           free(2);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 5 == watch(pool).size() );
+          CHECK ( 4 == watch(pool).cntFree() );
+          CHECK (13 == watch(pool).getMaxScore() );
+          CHECK ( 3 == watch(pool).getTurnover() );
 
-SHOW_EXPR(pool.shouldCleanup())
+          CHECK (not pool.shouldCleanup() );
+          // no complete turnover cycle yet
           
           claim(2);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 5 == watch(pool).size() );
+          CHECK ( 2 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 3 == watch(pool).getTurnover() );
           
           supply(4);
-SHOW_EXPR("supply")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(globalPool));
+          
+          CHECK ( 7 == watch(pool).size() );
+          CHECK ( 4 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 5 == watch(pool).getTurnover() );
 
           free(2);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(usedBuff));
+          CHECK ( 7 == watch(pool).size() );
+          CHECK ( 6 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 3 == watch(pool).getTurnover() );
           
           claim(1);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 7 == watch(pool).size() );
+          CHECK ( 5 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 3 == watch(pool).getTurnover() );
 
           free(1);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(usedBuff));
+          CHECK ( 7 == watch(pool).size() );
+          CHECK ( 6 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 2 == watch(pool).getTurnover() );
+
+          CHECK (pool.shouldCleanup());
+          // triggering now, since 20/MATCH_SCORE ≡ 2
 
-SHOW_EXPR(pool.shouldCleanup())
           removed = pool.cleanup(0.5, pushMem);
-SHOW_EXPR(removed)
+          CHECK (3 == removed);
+          CHECK (show(globalPool) == "11, 12, 21"_expect);
           
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(globalPool));
+          CHECK ( 4 == watch(pool).size() );
+          CHECK ( 3 == watch(pool).cntFree() );
+          CHECK (10 == watch(pool).getMaxScore() );
+          CHECK ( 4 == watch(pool).getTurnover() );
           
+          
+          //------------ PATTERN-4 : decreasing the fraction used
           claim(1);
           
-SHOW_EXPR("claim")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).cntResd())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 4 == watch(pool).size() );
+          CHECK ( 2 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 4 == watch(pool).getTurnover() );
 
           free(2);
           
-SHOW_EXPR("free")
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).cntFree())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
+          CHECK ( 4 == watch(pool).size() );
+          CHECK ( 4 == watch(pool).cntFree() );
+          CHECK (20 == watch(pool).getMaxScore() );
+          CHECK ( 2 == watch(pool).getTurnover() );
 
-SHOW_EXPR(pool.shouldCleanup())
-          removed = pool.cleanup(0.5, pushMem);
-SHOW_EXPR(removed)
+          CHECK (pool.shouldCleanup() );
           
-SHOW_EXPR(watch(pool).size())
-SHOW_EXPR(watch(pool).getMaxScore())
-SHOW_EXPR(watch(pool).getTurnover())
-SHOW_EXPR(show(globalPool));
+          removed = pool.cleanup(0.5, pushMem);
+          CHECK (3 == removed);
+          CHECK (show(globalPool) == "11, 12, 21, 33, 31, 13"_expect);
+          
+          CHECK ( 1 == watch(pool).size() );
+          CHECK (10 == watch(pool).getMaxScore() );
+          CHECK ( 1 == watch(pool).getTurnover() );
         }
       
     };
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 0010aed4f..99fdbfe15 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -145325,7 +145325,7 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1778802491003" ID="ID_1880673250" MODIFIED="1778979225756" TEXT="brauche noch einen Trigger-Mechanismus f&#xfc;r das heuristische Clean-up">
+<node BACKGROUND_COLOR="#c8c0b6" COLOR="#435e98" CREATED="1778802491003" ID="ID_1880673250" MODIFIED="1779762406992" TEXT="brauche noch einen Trigger-Mechanismus f&#xfc;r das heuristische Clean-up">
 <icon BUILTIN="yes"/>
 <node CREATED="1778805833301" ID="ID_493965127" MODIFIED="1778806330596" TEXT="man k&#xf6;nnte nach jeder de-Allokation einen partiellen clean-up machen">
 <node CREATED="1778805853860" ID="ID_1555068699" MODIFIED="1778806001396" TEXT="w&#xe4;re wirksam, da nur unterhalb der Schwelle aufger&#xe4;umt wird">
@@ -145412,7 +145412,7 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
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-<node CREATED="1778945962154" ID="ID_535774391" MODIFIED="1778945972518" TEXT="daraus einen Mechanismus entwickeln">
+<node COLOR="#435e98" CREATED="1778945962154" ID="ID_535774391" MODIFIED="1779762420870" TEXT="daraus einen Mechanismus entwickeln">
 <icon BUILTIN="idea"/>
 <node CREATED="1778946005609" ID="ID_1483973980" MODIFIED="1778946757293" TEXT="Ansatz: die bereits implementierte Aufr&#xe4;um-Heuristik ist zielf&#xfc;hrend">
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@@ -145482,9 +145482,9 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
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-<node BACKGROUND_COLOR="#fdfdcf" COLOR="#ff0000" CREATED="1778800660632" ID="ID_864970874" MODIFIED="1778979160301" TEXT="Zweck">
+<node COLOR="#338800" CREATED="1778800559849" ID="ID_1776275235" MODIFIED="1779762439896" TEXT="LocalBufferStore_test">
+<icon BUILTIN="button_ok"/>
+<node COLOR="#435e98" CREATED="1778800660632" ID="ID_864970874" MODIFIED="1779762437163" TEXT="Zweck">
 <icon BUILTIN="yes"/>
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@@ -145668,9 +145668,13 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
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-<node CREATED="1778968918381" ID="ID_752345967" MODIFIED="1778968922655" TEXT="verify_release">
+<node COLOR="#338800" CREATED="1778968918381" ID="ID_752345967" MODIFIED="1779762376165" TEXT="verify_release">
+<icon BUILTIN="button_ok"/>
 <node CREATED="1778969042432" ID="ID_1262962638" MODIFIED="1778969052166" TEXT="hier sollte auch ein clean-up provoziert werden"/>
-<node CREATED="1779665675415" ID="ID_1685534215" MODIFIED="1779665691018" TEXT="zu zeigen ist da&#xdf; dieser Clean-up mit R&#xfc;cksendung stattfindet"/>
+<node BACKGROUND_COLOR="#c8c0b6" COLOR="#435e98" CREATED="1779665675415" ID="ID_1685534215" MODIFIED="1779762386504" TEXT="zu zeigen ist da&#xdf; dieser Clean-up mit R&#xfc;cksendung stattfindet">
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+<icon BUILTIN="yes"/>
+</node>
 </node>
 <node COLOR="#5b280f" CREATED="1778969102656" ID="ID_249806133" MODIFIED="1779664543753" TEXT="verify_heuristic">
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@@ -145688,8 +145692,8 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
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+<node CREATED="1779664546343" HGAP="25" ID="ID_453821075" MODIFIED="1779762367351" TEXT="dieser Test geh&#xf6;rt zum LocalMemPool" VSHIFT="18">
+<arrowlink COLOR="#333263" DESTINATION="ID_1242239297" ENDARROW="Default" ENDINCLINATION="-1163;-399;" ID="Arrow_ID_1851213418" STARTARROW="None" STARTINCLINATION="-413;30;"/>
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@@ -145755,15 +145759,18 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
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 </html></richcontent>
 </node>
-<node CREATED="1776605858192" ID="ID_563549971" MODIFIED="1776605951752" TEXT="bleibe aber bei dem Namen &#x2014; weil er klar ist">
+<node CREATED="1776605858192" ID="ID_563549971" MODIFIED="1779762245934" TEXT="bleibe aber bei dem Namen &#x2014; weil er klar ist">
 <richcontent TYPE="NOTE"><html>
-  <head/>
+  <head>
+    
+  </head>
   <body>
     <p>
       das hier ist keine generische Library, sondern ein Application-Framework. Auch &#187;Vault&#171; ist inhaltlich genau auf Lumiera ausgerichtet, der Unterschied liegt nur im Grad der Integration mit Application-level Services
     </p>
   </body>
-</html></richcontent>
+</html>
+</richcontent>
 </node>
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@@ -147000,8 +147007,9 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
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+<node COLOR="#338800" CREATED="1778969102656" ID="ID_1242239297" MODIFIED="1779762145111" TEXT="verify_heuristic">
+<linktarget COLOR="#333263" DESTINATION="ID_1242239297" ENDARROW="Default" ENDINCLINATION="-1163;-399;" ID="Arrow_ID_1851213418" SOURCE="ID_453821075" STARTARROW="None" STARTINCLINATION="-413;30;"/>
+<icon BUILTIN="button_ok"/>
 <node CREATED="1778979230293" ID="ID_1129342480" MODIFIED="1779664866045" TEXT="meine Idee der Heuristik umsetzen">
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@@ -147037,8 +147045,23 @@ StM_bind(Builder&lt;R1&gt; b1, Extension&lt;R1,R2&gt; extension)
 <node CREATED="1779733348313" ID="ID_1867741071" MODIFIED="1779733353992" TEXT="wechselnd partiell verwenden"/>
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-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1778979252922" ID="ID_155080806" MODIFIED="1779733388847" TEXT="Verhalten sollte deterministisch sein und Erwartung entsprechen">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1778979252922" ID="ID_155080806" MODIFIED="1779762143255" TEXT="Verhalten sollte deterministisch sein und Erwartung entsprechen">
+<icon BUILTIN="button_ok"/>
+</node>
+<node BACKGROUND_COLOR="#c8c0b6" COLOR="#435e98" CREATED="1779762175999" ID="ID_1035469430" MODIFIED="1779762350703" TEXT="Clean-up ist auch in globaler Kommunikation sichtbar">
+<richcontent TYPE="NOTE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Wenn man eine gr&#246;&#223;ere Kapazit&#228;t reserviert, aber dann wiederholt immer nur einzelne Buffer belegt und wieder freigibt, sollte relativ bald der lokale Pool getrimmt werden, und die freigegebenen Buffer an den globaeln Pool zur&#252;ckgessend
+    </p>
+  </body>
+</html>
+</richcontent>
+<arrowlink COLOR="#1b26b8" DESTINATION="ID_1685534215" ENDARROW="Default" ENDINCLINATION="408;19;" ID="Arrow_ID_1702718350" STARTARROW="None" STARTINCLINATION="577;30;"/>
+<icon BUILTIN="yes"/>
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