diff -r a30e174ee937 src-db/database/sourcedata/AD_PREFERENCE.xml
--- a/src-db/database/sourcedata/AD_PREFERENCE.xml	Tue Jul 30 11:11:30 2019 +0200
+++ b/src-db/database/sourcedata/AD_PREFERENCE.xml	Tue Jul 30 11:14:47 2019 +0200
@@ -110,4 +110,16 @@
 <!--E649BD54D578432CB28EA882B2482499-->  <AD_MODULE_ID><![CDATA[E09B68E8080847CF99A3AA62238C7079]]></AD_MODULE_ID>
 <!--E649BD54D578432CB28EA882B2482499--></AD_PREFERENCE>
 
+<!--EAA7DD0594A442ADB966250FB5716357--><AD_PREFERENCE>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <AD_PREFERENCE_ID><![CDATA[EAA7DD0594A442ADB966250FB5716357]]></AD_PREFERENCE_ID>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <AD_ORG_ID><![CDATA[0]]></AD_ORG_ID>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <ISACTIVE><![CDATA[Y]]></ISACTIVE>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <VALUE><![CDATA[300]]></VALUE>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <PROPERTY><![CDATA[OBAWO_FE_LimitToIgnoreAttValues]]></PROPERTY>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <ISPROPERTYLIST><![CDATA[Y]]></ISPROPERTYLIST>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <AD_MODULE_ID><![CDATA[E09B68E8080847CF99A3AA62238C7079]]></AD_MODULE_ID>
+<!--EAA7DD0594A442ADB966250FB5716357-->  <EM_OPXUTIL_IS_HOST><![CDATA[N]]></EM_OPXUTIL_IS_HOST>
+<!--EAA7DD0594A442ADB966250FB5716357--></AD_PREFERENCE>
+
 </data>
diff -r a30e174ee937 src-db/database/sourcedata/AD_REF_LIST.xml
--- a/src-db/database/sourcedata/AD_REF_LIST.xml	Tue Jul 30 11:11:30 2019 +0200
+++ b/src-db/database/sourcedata/AD_REF_LIST.xml	Tue Jul 30 11:14:47 2019 +0200
@@ -264,6 +264,18 @@
 <!--73785C2843C341AB879F47DC3A3AAE24-->  <AD_MODULE_ID><![CDATA[E09B68E8080847CF99A3AA62238C7079]]></AD_MODULE_ID>
 <!--73785C2843C341AB879F47DC3A3AAE24--></AD_REF_LIST>
 
+<!--777CB065D7AB41B4915FA1C2900F83A5--><AD_REF_LIST>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <AD_REF_LIST_ID><![CDATA[777CB065D7AB41B4915FA1C2900F83A5]]></AD_REF_LIST_ID>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <AD_ORG_ID><![CDATA[0]]></AD_ORG_ID>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <ISACTIVE><![CDATA[Y]]></ISACTIVE>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <VALUE><![CDATA[OBAWO_FE_LimitToIgnoreAttValues]]></VALUE>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <NAME><![CDATA[Limit to ignore att values]]></NAME>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <DESCRIPTION><![CDATA[When the number of values allowed for an attribute is higher than the number defined for this preference, then values are not loaded in AWO FE]]></DESCRIPTION>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <AD_REFERENCE_ID><![CDATA[A26BA480E2014707B47257024C3CBFF7]]></AD_REFERENCE_ID>
+<!--777CB065D7AB41B4915FA1C2900F83A5-->  <AD_MODULE_ID><![CDATA[E09B68E8080847CF99A3AA62238C7079]]></AD_MODULE_ID>
+<!--777CB065D7AB41B4915FA1C2900F83A5--></AD_REF_LIST>
+
 <!--7A85B02AF9F644FDB40ECE0345FE7796--><AD_REF_LIST>
 <!--7A85B02AF9F644FDB40ECE0345FE7796-->  <AD_REF_LIST_ID><![CDATA[7A85B02AF9F644FDB40ECE0345FE7796]]></AD_REF_LIST_ID>
 <!--7A85B02AF9F644FDB40ECE0345FE7796-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
diff -r a30e174ee937 src/org/openbravo/warehouse/advancedwarehouseoperations/mobile/master/Attribute.java
--- a/src/org/openbravo/warehouse/advancedwarehouseoperations/mobile/master/Attribute.java	Tue Jul 30 11:11:30 2019 +0200
+++ b/src/org/openbravo/warehouse/advancedwarehouseoperations/mobile/master/Attribute.java	Tue Jul 30 11:14:47 2019 +0200
@@ -1,6 +1,6 @@
 /*
  ************************************************************************************
- * Copyright (C) 2016-2018 Openbravo S.L.U.
+ * Copyright (C) 2016-2019 Openbravo S.L.U.
  * Licensed under the Openbravo Commercial License version 1.0
  * You may obtain a copy of the License at http://www.openbravo.com/legal/obcl.html
  * or in the legal folder of this module distribution.
@@ -9,9 +9,11 @@
 
 package org.openbravo.warehouse.advancedwarehouseoperations.mobile.master;
 
+import java.io.IOException;
+import java.io.Writer;
 import java.util.Date;
 import java.util.HashMap;
-import java.util.List;
+import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Map.Entry;
 
@@ -23,19 +25,53 @@
 import org.codehaus.jettison.json.JSONObject;
 import org.hibernate.ScrollMode;
 import org.hibernate.ScrollableResults;
-import org.hibernate.criterion.Restrictions;
 import org.hibernate.query.Query;
 import org.openbravo.dal.core.OBContext;
-import org.openbravo.dal.service.OBCriteria;
 import org.openbravo.dal.service.OBDal;
+import org.openbravo.erpCommon.businessUtility.Preferences;
+import org.openbravo.erpCommon.utility.PropertyException;
+import org.openbravo.mobile.core.process.JSONRowConverter;
 import org.openbravo.model.common.plm.AttributeValue;
 import org.openbravo.service.json.JsonConstants;
 import org.openbravo.warehouse.advancedwarehouseoperations.mobile.utils.OBAWOJSONProcessSimple;
 
 public class Attribute extends OBAWOJSONProcessSimple {
-  public static final Logger log = Logger.getLogger(Attribute.class);
+  public static final Logger attLog = Logger.getLogger(Attribute.class);
+  public Map<String, JSONArray> cacheAttsValues;
+  public long maxNumberOfAttValuesToLoad = 300;
 
+  @Override
+  public void exec(Writer w, JSONObject jsonsent) throws IOException, ServletException {
+    checkTimeout();
+    JSONObject execResultJson;
+    try {
+      execResultJson = exec(jsonsent);
+      JSONObject contextInfo = getContextInformation();
+      if (contextInfo != null) {
+        execResultJson.put("contextInfo", contextInfo);
+      }
+      String responseStr = execResultJson.toString();
+      w.write(responseStr.substring(1, responseStr.length() - 1));
+    } catch (JSONException e) {
+      JSONRowConverter.addJSONExceptionFields(w, e);
+    }
+  }
+
+  @Override
   public JSONObject exec(JSONObject jsonsent) throws JSONException, ServletException {
+    this.cacheAttsValues = new LinkedHashMap<String, JSONArray>();
+    try {
+      OBContext.setAdminMode(false);
+      Long maxNumberOfAttValuesToLoadFromPref = Long.parseLong(Preferences.getPreferenceValue(
+          "OBAWO_FE_LimitToIgnoreAttValues", true, OBContext.getOBContext().getCurrentClient(),
+          OBContext.getOBContext().getCurrentOrganization(), OBContext.getOBContext().getUser(),
+          OBContext.getOBContext().getRole(), null));
+      maxNumberOfAttValuesToLoad = maxNumberOfAttValuesToLoadFromPref.longValue();
+    } catch (PropertyException e) {
+      attLog.error("Error getting preference OBAWO_FE_LimitToIgnoreAttValues " + e.getMessage(), e);
+    } finally {
+      OBContext.restorePreviousMode();
+    }
     JSONObject jsonResult = new JSONObject();
     JSONArray jsonData = new JSONArray();
     Long lastUpdated = jsonsent.has("lastUpdated")
@@ -137,17 +173,17 @@
           }
           JSONObject jsObj = this.readHeaderAttributes(attributeSetData.getBoolean(1),
               attributeSetData.getBoolean(2), attributeSetData.getBoolean(3), guranteeDays);
-          jsObj.put(attributeSetData.getString(5), this.readAttribute(
-              attributeSetData.getString(5), attributeSetData.getString(6),
-              attributeSetData.getBoolean(7), attributeSetData.getBoolean(8),
-              attributeSetData.getLong(9), attributeSetData.getBoolean(10)));
+          jsObj.put(attributeSetData.getString(5),
+              this.readAttribute(attributeSetData.getString(5), attributeSetData.getString(6),
+                  attributeSetData.getBoolean(7), attributeSetData.getBoolean(8),
+                  attributeSetData.getLong(9), attributeSetData.getBoolean(10)));
           attSetMap.put(curAttSetId, jsObj);
         } else {
           JSONObject curJsObj = attSetMap.get(curAttSetId);
-          curJsObj.put(attributeSetData.getString(5), this.readAttribute(
-              attributeSetData.getString(5), attributeSetData.getString(6),
-              attributeSetData.getBoolean(7), attributeSetData.getBoolean(8),
-              attributeSetData.getLong(9), attributeSetData.getBoolean(10)));
+          curJsObj.put(attributeSetData.getString(5),
+              this.readAttribute(attributeSetData.getString(5), attributeSetData.getString(6),
+                  attributeSetData.getBoolean(7), attributeSetData.getBoolean(8),
+                  attributeSetData.getLong(9), attributeSetData.getBoolean(10)));
         }
       }
       while (simpleAttributeSetData.next()) {
@@ -176,8 +212,8 @@
       jsonResult.put("endRow", (jsonData.length() - 1));
       jsonResult.put(JsonConstants.RESPONSE_STATUS, JsonConstants.RPCREQUEST_STATUS_SUCCESS);
     } catch (Exception e) {
-      throw new JSONException("An error happened while retrieving Attribute set Information: "
-          + e.getMessage());
+      throw new JSONException(
+          "An error happened while retrieving Attribute set Information: " + e.getMessage());
     } finally {
       OBContext.restorePreviousMode();
     }
@@ -187,6 +223,7 @@
   private JSONObject readAttribute(String id, String name, Boolean mandatory, Boolean list,
       Long seqNo, Boolean updatable) throws JSONException {
     JSONObject custAttJsonObj = new JSONObject();
+    ScrollableResults attValuesScrollableResults;
     custAttJsonObj.put("id", id);
     custAttJsonObj.put("mandatory", mandatory);
     custAttJsonObj.put("list", list);
@@ -194,18 +231,60 @@
     custAttJsonObj.put("seqNo", seqNo + 40);
     custAttJsonObj.put("updatable", updatable);
     if (list) {
-      OBCriteria<AttributeValue> attValueCrit = OBDal.getInstance().createCriteria(
-          AttributeValue.class);
-      attValueCrit.add(Restrictions.eq(AttributeValue.PROPERTY_ATTRIBUTE + ".id", id));
-      attValueCrit.addOrderBy(AttributeValue.PROPERTY_SEARCHKEY, true);
-      List<AttributeValue> lstAttValues = attValueCrit.list();
       JSONArray arrValues = new JSONArray();
-      for (AttributeValue attValueObj : lstAttValues) {
-        JSONObject valueJsObj = new JSONObject();
-        valueJsObj.put("id", attValueObj.getId());
-        valueJsObj.put("value", attValueObj.getSearchKey());
-        valueJsObj.put("name", attValueObj.getName());
-        arrValues.put(valueJsObj);
+      if (this.cacheAttsValues.containsKey(id)) {
+        arrValues = this.cacheAttsValues.get(id);
+      } else {
+        StringBuilder countAttValuesHqlQuerySelectString = new StringBuilder();
+        countAttValuesHqlQuerySelectString.append("select count(attvl.id) ");
+        StringBuilder attValuesHqlQuerySelectString = new StringBuilder();
+        attValuesHqlQuerySelectString.append("select attvl.id, attvl.searchKey, attvl.name ");
+        StringBuilder attValuesHqlQueryWhereString = new StringBuilder();
+        StringBuilder attValuesHqlQueryOrderByString = new StringBuilder();
+        attValuesHqlQueryWhereString.append("from " + AttributeValue.ENTITY_NAME + " attvl ");
+        attValuesHqlQueryWhereString.append("where attvl.attribute.id = :attid AND ");
+        attValuesHqlQueryWhereString.append("attvl.client.id = :clientid ");
+        attValuesHqlQueryOrderByString.append("order by attvl.searchKey ASC");
+        // Execute att values COUNT query
+        StringBuilder countAttValuesHqlQueryString = new StringBuilder();
+        countAttValuesHqlQueryString.append(countAttValuesHqlQuerySelectString);
+        countAttValuesHqlQueryString.append(attValuesHqlQueryWhereString);
+        Query<Long> countAttValuesQuery = OBDal.getInstance().getSession()
+            .createQuery(countAttValuesHqlQueryString.toString(), Long.class);
+        countAttValuesQuery.setParameter("attid", id);
+        countAttValuesQuery.setParameter("clientid",
+            OBContext.getOBContext().getCurrentClient().getId());
+        Long numberOfAttValuesForAtt = countAttValuesQuery.uniqueResult();
+        if (numberOfAttValuesForAtt.longValue() <= maxNumberOfAttValuesToLoad) {
+          // Execute att values GET query
+          StringBuilder attValuesHqlQueryString = new StringBuilder();
+          attValuesHqlQueryString.append(attValuesHqlQuerySelectString);
+          attValuesHqlQueryString.append(attValuesHqlQueryWhereString);
+          attValuesHqlQueryString.append(attValuesHqlQueryOrderByString);
+          Query<Object[]> attValuesQuery = OBDal.getInstance().getSession()
+              .createQuery(attValuesHqlQueryString.toString(), Object[].class);
+          attValuesQuery.setParameter("attid", id);
+          attValuesQuery.setParameter("clientid",
+              OBContext.getOBContext().getCurrentClient().getId());
+          attValuesQuery.setFetchSize((int) maxNumberOfAttValuesToLoad);
+          attValuesScrollableResults = attValuesQuery.scroll(ScrollMode.FORWARD_ONLY);
+          while (attValuesScrollableResults.next()) {
+            JSONObject valueJsObj = new JSONObject();
+            valueJsObj.put("id", (String) attValuesScrollableResults.get()[0]);
+            valueJsObj.put("value", (String) attValuesScrollableResults.get()[1]);
+            valueJsObj.put("name", (String) attValuesScrollableResults.get()[2]);
+            arrValues.put(valueJsObj);
+            // Clear the session after each loop to improve performance in inner flushes
+            OBDal.getInstance().getSession().clear();
+          }
+        } else {
+          // If number of values is greater than preference, then not execute query and log
+          attLog.info("Attribute " + name + " has " + numberOfAttValuesForAtt
+              + " values, more than " + maxNumberOfAttValuesToLoad
+              + " (from preference -OBAWO_FE_LimitToIgnoreAttValues-). They will not be loaded in AWO FE.");
+        }
+        // Save in cache
+        this.cacheAttsValues.put(id, arrValues);
       }
       custAttJsonObj.put("listValues", arrValues);
     }