diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/client/DatabasesManager.java b/src/main/java/org/gcube/portlets/user/databasesmanager/client/DatabasesManager.java
index bf208a6..3dac070 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/client/DatabasesManager.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/client/DatabasesManager.java
@@ -11,7 +11,7 @@ import com.google.gwt.user.client.ui.RootPanel;
 
 import org.gcube.portlets.user.databasesmanager.client.panels.GxtBorderLayoutPanel;
 import org.gcube.portlets.user.databasesmanager.client.resources.Resources;
-import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
+import org.gcube.portlets.user.databasesmanager.shared.ConstantsPortlet;
 import org.gcube.portlets.widgets.sessionchecker.client.CheckSession;
 
 /**
diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/client/datamodel/SQLDialect.java b/src/main/java/org/gcube/portlets/user/databasesmanager/client/datamodel/SQLDialect.java
index 2d2fe21..b69166b 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/client/datamodel/SQLDialect.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/client/datamodel/SQLDialect.java
@@ -2,7 +2,9 @@ package org.gcube.portlets.user.databasesmanager.client.datamodel;
 
 import java.util.ArrayList;
 import java.util.List;
-import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
+
+import org.gcube.portlets.user.databasesmanager.shared.ConstantsPortlet;
+
 import com.extjs.gxt.ui.client.data.BaseModelData;
 
 public class SQLDialect extends BaseModelData {
diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtBorderLayoutPanel.java b/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtBorderLayoutPanel.java
index 001e356..d4a9026 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtBorderLayoutPanel.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtBorderLayoutPanel.java
@@ -31,7 +31,7 @@ import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SmartSa
 import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SubmitQueryEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.resources.Images;
 import org.gcube.portlets.user.databasesmanager.client.toolbar.GxtToolbarFunctionality;
-import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
+import org.gcube.portlets.user.databasesmanager.shared.ConstantsPortlet;
 import org.gcube.portlets.user.databasesmanager.shared.SessionExpiredException;
 import org.gcube.portlets.widgets.sessionchecker.client.CheckSession;
 
diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtTreePanel.java b/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtTreePanel.java
index 5824223..dee7da2 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtTreePanel.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/client/panels/GxtTreePanel.java
@@ -14,7 +14,6 @@ import org.gcube.portlets.user.databasesmanager.client.events.RefreshDataEvent;
 import org.gcube.portlets.user.databasesmanager.client.events.SelectedItemEvent;
 import org.gcube.portlets.user.databasesmanager.client.events.interfaces.RefreshDataEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.resources.Images;
-import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
 import com.extjs.gxt.ui.client.Style.Scroll;
 import com.extjs.gxt.ui.client.Style.SelectionMode;
 import com.extjs.gxt.ui.client.data.ModelIconProvider;
@@ -33,6 +32,7 @@ import com.google.gwt.user.client.Event;
 import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.google.gwt.user.client.ui.AbstractImagePrototype;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.GeneralOutputFromServlet;
+import org.gcube.portlets.user.databasesmanager.shared.ConstantsPortlet;
 import org.gcube.portlets.user.databasesmanager.shared.SessionExpiredException;
 import org.gcube.portlets.widgets.sessionchecker.client.CheckSession;
 
diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/client/toolbar/GxtToolbarFunctionality.java b/src/main/java/org/gcube/portlets/user/databasesmanager/client/toolbar/GxtToolbarFunctionality.java
index 3d9a078..a3c085a 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/client/toolbar/GxtToolbarFunctionality.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/client/toolbar/GxtToolbarFunctionality.java
@@ -19,8 +19,8 @@ import org.gcube.portlets.user.databasesmanager.client.events.SubmitQueryEvent;
 import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SelectedItemEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.events.interfaces.SelectedTableEventHandler;
 import org.gcube.portlets.user.databasesmanager.client.form.GxtFormSubmitQuery;
-import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
 import org.gcube.portlets.user.databasesmanager.client.utils.UIDGenerator;
+import org.gcube.portlets.user.databasesmanager.shared.ConstantsPortlet;
 import org.gcube.portlets.user.databasesmanager.shared.SessionExpiredException;
 import org.gcube.portlets.widgets.sessionchecker.client.CheckSession;
 
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 448ba5e..9b0bf17 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
@@ -24,6 +24,8 @@ import net.sf.ehcache.Cache;
 import net.sf.ehcache.CacheManager;
 import net.sf.ehcache.config.CacheConfiguration;
 import net.sf.ehcache.config.MemoryUnit;
+import net.sf.ehcache.config.SizeOfPolicyConfiguration;
+import net.sf.ehcache.config.SizeOfPolicyConfiguration.MaxDepthExceededBehavior;
 import net.sf.ehcache.store.MemoryStoreEvictionPolicy;
 import org.apache.regexp.RE;
 import org.gcube.application.framework.core.session.ASLSession;
@@ -61,9 +63,9 @@ import org.gcube.portlets.user.databasesmanager.client.datamodel.Result;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.SamplingResultWithFileFromServlet;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.Row;
 import org.gcube.portlets.user.databasesmanager.client.datamodel.SubmitQueryResultWithFileFromServlet;
-import org.gcube.portlets.user.databasesmanager.client.utils.ConstantsPortlet;
 import org.gcube.portlets.user.databasesmanager.server.util.DataExchangedThroughQueue;
 import org.gcube.portlets.user.databasesmanager.server.util.SessionUtil;
+import org.gcube.portlets.user.databasesmanager.shared.ConstantsPortlet;
 import org.gcube.portlets.user.databasesmanager.shared.SessionExpiredException;
 import org.gcube.portlets.user.databasesmanager.shared.StatisticalManagerException;
 import com.extjs.gxt.ui.client.data.BasePagingLoadResult;
@@ -183,6 +185,10 @@ public class GWTdbManagerServiceImpl extends RemoteServiceServlet implements
 			config.overflowToDisk(true);
 			config.diskPersistent(false);
 			config.diskStorePath(cachePath);
+//			SizeOfPolicyConfiguration size = new SizeOfPolicyConfiguration();
+//			size.setMaxDepth(1000);
+//			size.maxDepthExceededBehavior(MaxDepthExceededBehavior.ABORT);
+//			config.sizeOfPolicy(size);
 			DBCache = new Cache(config);
 		} catch (Exception e) {
 			// logger.error("dbmanager-> Error while starting the servlet. Failed to create the cache",
diff --git a/src/main/java/org/gcube/portlets/user/databasesmanager/client/utils/ConstantsPortlet.java b/src/main/java/org/gcube/portlets/user/databasesmanager/shared/ConstantsPortlet.java
similarity index 96%
rename from src/main/java/org/gcube/portlets/user/databasesmanager/client/utils/ConstantsPortlet.java
rename to src/main/java/org/gcube/portlets/user/databasesmanager/shared/ConstantsPortlet.java
index 2ee9402..274f391 100644
--- a/src/main/java/org/gcube/portlets/user/databasesmanager/client/utils/ConstantsPortlet.java
+++ b/src/main/java/org/gcube/portlets/user/databasesmanager/shared/ConstantsPortlet.java
@@ -1,4 +1,4 @@
-package org.gcube.portlets.user.databasesmanager.client.utils;
+package org.gcube.portlets.user.databasesmanager.shared;
 
 public class ConstantsPortlet {