diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/server/GWTdbManagerServiceImpl.java b/src/main/java/org/gcube/portlets/user/databasesmanager/server/GWTdbManagerServiceImpl.java
index cded38b..f4708bd 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/server/GWTdbManagerServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/server/GWTdbManagerServiceImpl.java
@@ -94,6 +94,12 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 	private static boolean threadExecutionFinished = false;
 	private static ConcurrentLinkedQueue<DataExchangedThroughQueue> queue = new ConcurrentLinkedQueue<DataExchangedThroughQueue>();
 	private static ThreadDataLoader dataLoader;
+	
+	private static int smComputationNumber;
+	private static int cacheHitsNumber;
+	
+	private static int smComputationQuerySamplingNumber;
+	private static int cacheQuerySamplingHitsNumber;
 
 	public GWTdbManagerServiceImpl() throws Exception {
 	}
@@ -103,7 +109,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 		super.init();
 		
 		try {
-
+			
 			// cache folder
 			String cachePath = System.getenv("CATALINA_TMPDIR") + "/DBManager";
 			logger.info("dbmanager-> Creating cache in folder: " + cachePath);
@@ -159,6 +165,13 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			// create the thread DataLoader
 			dataLoader = new ThreadDataLoader();
 			logger.info("dbmanager-> Thread Dataloader created");
+			
+			smComputationNumber = 0;
+			cacheHitsNumber = 0;
+			
+			smComputationQuerySamplingNumber = 0;
+			cacheQuerySamplingHitsNumber = 0;
+			
 		} catch (Exception e) {
 			logger.error("dbmanager-> ", e);
 
@@ -286,7 +299,12 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 		HashMap<String, String> listKeySubmitQueryResult = new HashMap<String, String>();
 		session.setAttribute("listKeySubmitQueryResult",
 				listKeySubmitQueryResult);
-
+		
+		//print data 
+		logger.info("dbmanager-> CheckInformation: cache hits number " + cacheHitsNumber);
+		logger.info("dbmanager-> CheckInformation: SM computation number " + smComputationNumber);
+		logger.info("dbmanager-> CheckInformation: cache Query Sampling hits number " + cacheQuerySamplingHitsNumber);
+		logger.info("dbmanager-> CheckInformation: SM Query Sampling computation number " + smComputationQuerySamplingNumber);
 	}
 
 	// to get resources from IS
@@ -629,12 +647,19 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			if ((data != null) && (submitQueryResult != null)) {
 				result = (SubmitQueryResultWithFileFromServlet) data;
 
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
+				cacheQuerySamplingHitsNumber++;
 				// set variable to true value if cached data are used and a
 				// computation is not started
 				Boolean val = new Boolean(true);
 				updateListSubmitQueryUIDCachedData(UID, val);
 
 			} else {
+				
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
+				smComputationQuerySamplingNumber++;
 
 				// set variable to false value if cached data are not used and a
 				// computation is started
@@ -648,6 +673,7 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 				String computationId = startComputation(algorithmId,
 						inputParameters, outputData, scope, UID);
 				
+								
 				// get JobID
 				if (checkJob(UID)) { // if the computation has not been removed
 										// the job uid is present
@@ -858,11 +884,16 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			}
 			if (value != null) {
 				result = (SamplingResultWithFileFromServlet) value;
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
+				cacheQuerySamplingHitsNumber++;
 
 			} else {
 
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
+				smComputationQuerySamplingNumber++;
 				// start computation
-
 				// create data structure
 				ComputationOutput outputData = new ComputationOutput();
 				// computation id
@@ -1012,9 +1043,13 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			}
 			if (value != null) {
 				result = (SamplingResultWithFileFromServlet) value;
-
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
+				cacheQuerySamplingHitsNumber++;
 			} else {
-
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
+				smComputationQuerySamplingNumber++;
 				// create data structure
 				ComputationOutput outputData = new ComputationOutput();
 				// computation id
@@ -2490,8 +2525,13 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			if (value != null) {
 				// System.out.println("***GETTING DATA FROM CACHE");
 				outputParameters = (List<FileModel>) value;
+				
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
 			} else {
-
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
+						
 				// start the computation
 				// System.out.println("***STARTING THE COMPUTATION");
 				// create data structure for data output
@@ -2571,9 +2611,12 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			}
 			if (value != null) {
 				outputParameters = (LinkedHashMap<String, FileModel>) value;
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
 				// System.out.println("***GETTING DATA FROM CACHE");
 			} else {
-
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
 				// start the computation
 				// System.out.println("***STARTING THE COMPUTATION");
 				// create data structure
@@ -2683,7 +2726,11 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			}
 			if (value != null) {
 				outputParameters = (List<FileModel>) value;
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
 			} else {
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
 
 				// start the computation
 				// create data structure
@@ -2808,9 +2855,13 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			}
 			if (value != null) {
 				outputParameters = (List<Result>) value;
+				cacheHitsNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data found in cache. cacheHitsNumber: " + cacheHitsNumber);
 
 			} else {
 
+				smComputationNumber++;
+				logger.info("dbmanager-> CheckDataInCache: data not found in cache. Starting the Statistical Computation. smComputationNumber: " + smComputationNumber);
 				// start computation
 				// create data structure
 				ComputationOutput outputData = new ComputationOutput();