diff --git a/bin/benchmark-bootstrap.sh b/bin/benchmark-bootstrap.sh
index 8f0af19..663753d 100755
--- a/bin/benchmark-bootstrap.sh
+++ b/bin/benchmark-bootstrap.sh
@@ -83,7 +83,7 @@ CP=${CP}":${SCRIPT_DIR}/../libs/*"
 #
 # ADD YOUR/CHANGE ADDITIONAL OPTIONS HERE
 #
-JVM_OPTS="-Xms2g -Xmx2g -server -Djava.net.preferIPv4Stack=true "${JVM_OPTS}
+JVM_OPTS="-Djava.net.preferIPv4Stack=true "${JVM_OPTS}
 
 #
 # Assertions are disabled by default.
diff --git a/bin/benchmark-servers-stop.sh b/bin/benchmark-servers-stop.sh
index 8f65ebe..a5549d8 100755
--- a/bin/benchmark-servers-stop.sh
+++ b/bin/benchmark-servers-stop.sh
@@ -71,7 +71,7 @@ if [ "${REMOTE_USER}" == "" ]; then
     exit 1
 fi
 
-pkill -9 -f "benchmark-server-restarter-start.sh"
+pkill -f "benchmark-server-restarter-start.sh"
 
 if [[ "${RESTART_SERVERS}" != "true" ]] && [[ "${RESTART_SERVERS}" != "false" ]]; then
     echo "<"$(date +"%H:%M:%S")"><yardstick> All server restartets are stopped."
@@ -82,10 +82,10 @@ for host_name in "${hosts0[@]}";
 do
     if [[ ${host_name} = "127.0.0.1" || ${host_name} = "localhost" ]]
         then
-            pkill -9 -f "Dyardstick.server"
+            pkill -f "Dyardstick.server"
 
         else
-            `ssh -o PasswordAuthentication=no ${REMOTE_USER}"@"${host_name} pkill -9 -f "Dyardstick.server"`
+            `ssh -o PasswordAuthentication=no ${REMOTE_USER}"@"${host_name} pkill -f "Dyardstick.server"`
         fi
 
     echo "<"$(date +"%H:%M:%S")"><yardstick> Server is stopped on "${host_name}