diff --git a/dhp-workflows/dhp-usage-raw-data-update/src/main/resources/eu/dnetlib/dhp/oa/graph/usagerawdata/oozie_app/workflow.xml b/dhp-workflows/dhp-usage-raw-data-update/src/main/resources/eu/dnetlib/dhp/oa/graph/usagerawdata/oozie_app/workflow.xml
index 022a107ab..b684b5e24 100644
--- a/dhp-workflows/dhp-usage-raw-data-update/src/main/resources/eu/dnetlib/dhp/oa/graph/usagerawdata/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-usage-raw-data-update/src/main/resources/eu/dnetlib/dhp/oa/graph/usagerawdata/oozie_app/workflow.xml
@@ -30,6 +30,10 @@
                 <name>oozie.launcher.mapred.job.queue.name</name>
                 <value>${oozieLauncherQueueName}</value>
             </property>
+            <property>
+                <name>mapred.child.java.opts</name>
+                <value>-Xmx16g</value>
+            </property>
         </configuration>
     </global>