diff --git a/modules/dcache/src/main/java/diskCacheV111/poolManager/PoolSelectionUnitV2.java b/modules/dcache/src/main/java/diskCacheV111/poolManager/PoolSelectionUnitV2.java
index 26a06a2505c..9136719280a 100644
--- a/modules/dcache/src/main/java/diskCacheV111/poolManager/PoolSelectionUnitV2.java
+++ b/modules/dcache/src/main/java/diskCacheV111/poolManager/PoolSelectionUnitV2.java
@@ -102,6 +102,7 @@ public String getVersion() {
                 .build();
     private boolean _useRegex;
     private boolean _allPoolsActive;
+    public  boolean _cachingEnabeled;
 
     /**
      * Ok, this is the critical part of PoolManager, but (!!!) the whole select path is READ-ONLY,
@@ -115,6 +116,12 @@ public String getVersion() {
 
     private final NetHandler _netHandler = new NetHandler();
     private transient PnfsHandler _pnfsHandler;
+
+    public void setCachingEnabeled(boolean cachingEnabeled) {
+        _cachingEnabeled = cachingEnabeled;
+    }
+
+
     @Override
     public Map<String, SelectionLink> getLinks() {
         rlock();
@@ -655,28 +662,36 @@ public PoolPreferenceLevel[] match(DirectionType type, String netUnitName,
               type, storeUnitName, dCacheUnitName, netUnitName, protocolUnitName,
               variableMap, storageInfo.locations(), linkGroupName);
 
+
+
         String cacheKey = null;
-        try {
-            Unit unit = _netHandler.match(netUnitName);
-            netUnitGroup = unit._uGroupList.values()
-                  .stream()
-                  .map(UGroup::getName).findFirst().get();
+        if (_cachingEnabeled) {
+
+            try {
+                Unit unit = _netHandler.match(netUnitName);
+                netUnitGroup = unit._uGroupList.values()
+                      .stream()
+                      .map(UGroup::getName).findFirst().get();
 
-            LOGGER.debug("this IP address belongs to {} in uGroup {} ", netUnitName, netUnitGroup);
+                LOGGER.debug("this IP address  belongs to {} in uGroup {} ", netUnitName, netUnitGroup);
 
 
-        } catch (UnknownHostException e) {
-            LOGGER.error("Caching did not work, please check the configuration " + e);
-        }
+            } catch (UnknownHostException e) {
+                LOGGER.error("Caching did not work, please check the configuration " + e);
+            }
 
-        cacheKey = type.toString() + storeUnitName + dCacheUnitName +
-              netUnitGroup + protocolUnitName + linkGroupName;
+            cacheKey = type.toString() + storeUnitName + dCacheUnitName +
+                  netUnitGroup + protocolUnitName + linkGroupName;
 
-        PoolPreferenceLevel[] cachedMatchValueTmp = cachedMatchValue.getIfPresent(cacheKey);
-        if (cachedMatchValueTmp != null) {
-            return cachedMatchValueTmp;
+            PoolPreferenceLevel[] cachedMatchValueTmp = cachedMatchValue.getIfPresent(cacheKey);
+            if (cachedMatchValueTmp != null) {
+                //counter = counter + 1;
+                //System.out.println("counter " + counter);
+                return cachedMatchValueTmp;
 
+            }
         }
+
         PoolPreferenceLevel[] result = null;
         rlock();
         try {
@@ -699,7 +714,9 @@ public PoolPreferenceLevel[] match(DirectionType type, String netUnitName,
         if (LOGGER.isDebugEnabled()) {
             logResult(result);
         }
-        cachedMatchValue.put(cacheKey, result);
+        if (_cachingEnabeled){
+            cachedMatchValue.put(cacheKey, result);
+        }
         return result;
     }
 
@@ -1157,7 +1174,7 @@ public void setAllPoolsActive(String mode) {
                     break;
                 default:
                     throw new IllegalArgumentException(
-                          "Syntax error, no such mode: " + mode);
+                          "Syntax error," + " no such mode: " + mode);
             }
         } finally {
             wunlock();
@@ -2629,8 +2646,11 @@ private String poolCountDescriptionFor(int count) {
     }
 
     protected void wlock() {
+
         _psuWriteLock.lock();
-        cachedMatchValue.invalidateAll();
+        if (_cachingEnabeled) {
+            cachedMatchValue.invalidateAll();
+        }
     }
 
     protected void wunlock() {
diff --git a/modules/dcache/src/test/java/org/dcache/tests/poolmanager/PoolSelectionUnitTest.java b/modules/dcache/src/test/java/org/dcache/tests/poolmanager/PoolSelectionUnitTest.java
index c6f9d06cc3c..942741d1af6 100644
--- a/modules/dcache/src/test/java/org/dcache/tests/poolmanager/PoolSelectionUnitTest.java
+++ b/modules/dcache/src/test/java/org/dcache/tests/poolmanager/PoolSelectionUnitTest.java
@@ -334,6 +334,8 @@ public void testTheSameCached() throws CommandException {
         FileAttributes fileAttributes = new FileAttributes();
         StorageInfos.injectInto(GenericStorageInfo.valueOf("*", "*"), fileAttributes);
 
+        _psu._cachingEnabeled = true;
+
         PoolPreferenceLevel[] preferenceRes1 = _psu.match(
               DirectionType.READ,  // operation
               "131.169.214.149", // net unit
diff --git a/skel/share/defaults/poolmanager.properties b/skel/share/defaults/poolmanager.properties
index 7c2ae5a5569..91eaeffb220 100644
--- a/skel/share/defaults/poolmanager.properties
+++ b/skel/share/defaults/poolmanager.properties
@@ -114,3 +114,11 @@ poolmanager.request-notifier.timeout=1
 (obsolete)poolmanager.cell.export = See poolmanager.cell.consume
 (forbidden)poolmanager.plugins.selection-unit =
 (forbidden)poolmanager.plugins.quota-manager =
+
+#
+# This property is used to optimise pool selection based on the idea that
+# when a request is coming the probability  that the next request for pool selection will
+# have the same selection parameters  is very high.  depending on the set up you can switch on/ and off
+# the caching of the selected pools.
+
+(one-of?true|false)poolmanager.selection.unit.cachingenabeled = false