diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateStatsJob.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateStatsJob.java
index 8a7229b647..8a9009f324 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateStatsJob.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/GenerateStatsJob.java
@@ -3,11 +3,16 @@ package eu.dnetlib.dhp.broker.oa;
 
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
+import java.io.IOException;
 import java.util.Optional;
+import java.util.Properties;
 
 import org.apache.commons.io.IOUtils;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
 import org.apache.spark.SparkConf;
-import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.Encoders;
 import org.apache.spark.sql.TypedColumn;
 import org.slf4j.Logger;
@@ -29,7 +34,7 @@ public class GenerateStatsJob {
 			IOUtils
 				.toString(
 					GenerateStatsJob.class
-						.getResourceAsStream("/eu/dnetlib/dhp/broker/oa/common_params.json")));
+						.getResourceAsStream("/eu/dnetlib/dhp/broker/oa/stats_params.json")));
 		parser.parseArgument(args);
 
 		final Boolean isSparkSessionManaged = Optional
@@ -43,21 +48,50 @@ public class GenerateStatsJob {
 		final String eventsPath = parser.get("workingPath") + "/events";
 		log.info("eventsPath: {}", eventsPath);
 
-		final String statsPath = parser.get("workingPath") + "/stats";
-		log.info("stats: {}", statsPath);
+		final String dbUrl = parser.get("dbUrl");
+		log.info("dbUrl: {}", dbUrl);
+
+		final String dbUser = parser.get("dbUser");
+		log.info("dbUser: {}", dbUser);
+
+		final String dbPassword = parser.get("dbPassword");
+		log.info("dbPassword: {}", "***");
+
+		final String brokerApiBaseUrl = parser.get("brokerApiBaseUrl");
+		log.info("brokerApiBaseUrl: {}", brokerApiBaseUrl);
 
 		final TypedColumn<Event, DatasourceStats> aggr = new StatsAggregator().toColumn();
 
+		final Properties connectionProperties = new Properties();
+		connectionProperties.put("user", dbUser);
+		connectionProperties.put("password", dbPassword);
+
 		runWithSparkSession(conf, isSparkSessionManaged, spark -> {
 
-			final Dataset<DatasourceStats> stats = ClusterUtils
+			ClusterUtils
 				.readPath(spark, eventsPath, Event.class)
-				.groupByKey(e -> e.getMap().getTargetDatasourceId(), Encoders.STRING())
+				.groupByKey(e -> e.getTopic() + "@@@" + e.getMap().getTargetDatasourceId(), Encoders.STRING())
 				.agg(aggr)
-				.map(t -> t._2, Encoders.bean(DatasourceStats.class));
+				.map(t -> t._2, Encoders.bean(DatasourceStats.class))
+				.write()
+				.jdbc(dbUrl, "oa_datasource_stats_temp", connectionProperties);
+
+			log.info("*** updateStats");
+			updateStats(brokerApiBaseUrl);
+			log.info("*** ALL done.");
 
-			ClusterUtils.save(stats, statsPath, DatasourceStats.class, null);
 		});
 	}
 
+	private static String updateStats(final String brokerApiBaseUrl) throws IOException {
+		final String url = brokerApiBaseUrl + "/api/openaireBroker/stats/update";
+		final HttpGet req = new HttpGet(url);
+
+		try (final CloseableHttpClient client = HttpClients.createDefault()) {
+			try (final CloseableHttpResponse response = client.execute(req)) {
+				return IOUtils.toString(response.getEntity().getContent());
+			}
+		}
+	}
+
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/DatasourceStats.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/DatasourceStats.java
index 8b628809db..979bac2da6 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/DatasourceStats.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/DatasourceStats.java
@@ -2,8 +2,6 @@
 package eu.dnetlib.dhp.broker.oa.util.aggregators.stats;
 
 import java.io.Serializable;
-import java.util.HashMap;
-import java.util.Map;
 
 public class DatasourceStats implements Serializable {
 
@@ -15,7 +13,8 @@ public class DatasourceStats implements Serializable {
 	private String id;
 	private String name;
 	private String type;
-	private Map<String, Long> topics = new HashMap<>();
+	private String topic;
+	private long size = 0l;
 
 	public String getId() {
 		return id;
@@ -41,21 +40,24 @@ public class DatasourceStats implements Serializable {
 		this.type = type;
 	}
 
-	public Map<String, Long> getTopics() {
-		return topics;
+	public String getTopic() {
+		return topic;
 	}
 
-	public void setTopics(final Map<String, Long> topics) {
-		this.topics = topics;
+	public void setTopic(final String topic) {
+		this.topic = topic;
 	}
 
-	public void incrementTopic(final String topic, final long inc) {
-		if (topics.containsKey(topic)) {
-			topics.put(topic, topics.get(topic) + inc);
-		} else {
-			topics.put(topic, inc);
-		}
+	public long getSize() {
+		return size;
+	}
 
+	public void setSize(final long size) {
+		this.size = size;
+	}
+
+	public void incrementSize(final long inc) {
+		this.size = this.size + inc;
 	}
 
 }
diff --git a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/StatsAggregator.java b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/StatsAggregator.java
index 5aa6698e39..240e2d2112 100644
--- a/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/StatsAggregator.java
+++ b/dhp-workflows/dhp-broker-events/src/main/java/eu/dnetlib/dhp/broker/oa/util/aggregators/stats/StatsAggregator.java
@@ -25,7 +25,8 @@ public class StatsAggregator extends Aggregator<Event, DatasourceStats, Datasour
 		stats.setId(e.getMap().getTargetDatasourceId());
 		stats.setName(e.getMap().getTargetDatasourceName());
 		stats.setType(e.getMap().getTargetDatasourceType());
-		stats.incrementTopic(e.getTopic(), 1l);
+		stats.setTopic(e.getTopic());
+		stats.incrementSize(1l);
 		return stats;
 	}
 
@@ -35,8 +36,9 @@ public class StatsAggregator extends Aggregator<Event, DatasourceStats, Datasour
 			stats0.setId(stats1.getId());
 			stats0.setName(stats1.getName());
 			stats0.setType(stats1.getType());
+			stats0.setTopic(stats1.getTopic());
 		}
-		stats1.getTopics().entrySet().forEach(e -> stats0.incrementTopic(e.getKey(), e.getValue()));
+		stats0.incrementSize(stats1.getSize());
 		return stats0;
 	}
 
diff --git a/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/partial/oozie_app/workflow.xml b/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/partial/oozie_app/workflow.xml
index a9741a3074..407b9f42f7 100644
--- a/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/partial/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/partial/oozie_app/workflow.xml
@@ -44,6 +44,18 @@
         	<name>brokerApiBaseUrl</name>
         	<description>the url of the broker service api</description>
         </property>
+        <property>
+        	<name>brokerDbUrl</name>
+        	<description>the url of the broker database</description>
+        </property>
+        <property>
+        	<name>brokerDbUser</name>
+        	<description>the user of the broker database</description>
+        </property>
+        <property>
+        	<name>brokerDbPassword</name>
+        	<description>the password of the broker database</description>
+        </property>
         <property>
             <name>sparkDriverMemory</name>
             <description>memory for driver process</description>
@@ -99,18 +111,18 @@
         </configuration>
     </global>
 
-    <start to="partitionByDsId"/>
+    <start to="stats"/>
 
     <kill name="Kill">
         <message>Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
     </kill>
     
-    <action name="partitionByDsId">
+    <action name="stats">
         <spark xmlns="uri:oozie:spark-action:0.2">
             <master>yarn</master>
             <mode>cluster</mode>
-            <name>PartitionEventsByDsIdJob</name>
-            <class>eu.dnetlib.dhp.broker.oa.PartitionEventsByDsIdJob</class>
+            <name>GenerateStatsJob</name>
+            <class>eu.dnetlib.dhp.broker.oa.GenerateStatsJob</class>
             <jar>dhp-broker-events-${projectVersion}.jar</jar>
             <spark-opts>
                 --executor-cores=${sparkExecutorCores}
@@ -122,8 +134,11 @@
                 --conf spark.eventLog.dir=${nameNode}${spark2EventLogDir}
                 --conf spark.sql.shuffle.partitions=3840
             </spark-opts>
-            <arg>--graphPath</arg><arg>${graphInputPath}</arg>
             <arg>--workingPath</arg><arg>${workingPath}</arg>
+            <arg>--dbUrl</arg><arg>${brokerDbUrl}</arg>
+            <arg>--dbUser</arg><arg>${brokerDbUser}</arg>
+            <arg>--dbPassword</arg><arg>${brokerDbPassword}</arg>
+            <arg>--brokerApiBaseUrl</arg><arg>${brokerApiBaseUrl}</arg>
         </spark>
         <ok to="End"/>
         <error to="Kill"/>
diff --git a/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/stats_params.json b/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/stats_params.json
new file mode 100644
index 0000000000..15d7d251f6
--- /dev/null
+++ b/dhp-workflows/dhp-broker-events/src/main/resources/eu/dnetlib/dhp/broker/oa/stats_params.json
@@ -0,0 +1,32 @@
+[
+	{
+		"paramName": "wp",
+		"paramLongName": "workingPath",
+		"paramDescription": "the working path",
+		"paramRequired": true
+	},
+	{
+		"paramName": "dburl",
+		"paramLongName": "dbUrl",
+		"paramDescription": "the broker database url",
+		"paramRequired": true
+	},
+	{
+		"paramName": "u",
+		"paramLongName": "dbUser",
+		"paramDescription": "the broker database user",
+		"paramRequired": true
+	},
+	{
+		"paramName": "p",
+		"paramLongName": "dbPassword",
+		"paramDescription": "the broker database password",
+		"paramRequired": true
+	},
+	{
+		"paramName": "broker",
+		"paramLongName": "brokerApiBaseUrl",
+		"paramDescription": "the url of the broker service api",
+		"paramRequired": true
+	}
+]