diff --git a/build/docker/milvus/centos7/Dockerfile b/build/docker/milvus/centos7/Dockerfile
index 36e36d67ab520e02d7cab16afe31c3783cf99f4b..b8549f91a23bf87ea01d49bdf3b2cfd11a7c3b9c 100644
--- a/build/docker/milvus/centos7/Dockerfile
+++ b/build/docker/milvus/centos7/Dockerfile
@@ -32,6 +32,7 @@ COPY ./lib/ /milvus/lib/
 
 ENV PATH=/milvus/bin:$PATH
 ENV LD_LIBRARY_PATH=/milvus/lib:$LD_LIBRARY_PATH:/usr/lib
+ENV LD_PRELOAD=/milvus/lib/libjemalloc.so
 
 # Add Tini
 ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
diff --git a/build/docker/milvus/ubuntu18.04/Dockerfile b/build/docker/milvus/ubuntu18.04/Dockerfile
index 2480cc92b9f89d79c4cfc2449e52b7a319d00ea3..b9c387a3e164d4b061255d12dafbaf0ea43ea190 100644
--- a/build/docker/milvus/ubuntu18.04/Dockerfile
+++ b/build/docker/milvus/ubuntu18.04/Dockerfile
@@ -32,6 +32,7 @@ COPY ./lib/ /milvus/lib/
 
 ENV PATH=/milvus/bin:$PATH
 ENV LD_LIBRARY_PATH=/milvus/lib:$LD_LIBRARY_PATH:/usr/lib
+ENV LD_PRELOAD=/milvus/lib/libjemalloc.so
 
 # Add Tini
 ADD https://github.com/krallin/tini/releases/download/v0.19.0/tini /tini
diff --git a/cmd/roles/roles.go b/cmd/roles/roles.go
index aaaf582b8b1019acd474b8ad5867ee8d8a1f132d..c02544b50f95da8485e68ff6808d676149ea9a1b 100644
--- a/cmd/roles/roles.go
+++ b/cmd/roles/roles.go
@@ -90,6 +90,14 @@ func (mr *MilvusRoles) EnvValue(env string) bool {
 	return env == "1" || env == "true"
 }
 
+func (mr *MilvusRoles) printLDPreLoad() {
+	const LDPreLoad = "LD_PRELOAD"
+	val, ok := os.LookupEnv(LDPreLoad)
+	if ok {
+		log.Info("Enable Jemalloc", zap.String("Jemalloc Path", val))
+	}
+}
+
 func (mr *MilvusRoles) runRootCoord(ctx context.Context, localMsg bool) *components.RootCoord {
 	var rc *components.RootCoord
 	var wg sync.WaitGroup
@@ -349,6 +357,7 @@ func (mr *MilvusRoles) runIndexNode(ctx context.Context, localMsg bool, alias st
 func (mr *MilvusRoles) Run(local bool, alias string) {
 	log.Info("starting running Milvus components")
 	ctx, cancel := context.WithCancel(context.Background())
+	mr.printLDPreLoad()
 
 	// only standalone enable localMsg
 	if local {
diff --git a/scripts/start_cluster.sh b/scripts/start_cluster.sh
index db3a6ffb7ecf2ad79090990515a13a9dd94eb742..042dc8f2e731148754d39701e31d945ea6380f08 100755
--- a/scripts/start_cluster.sh
+++ b/scripts/start_cluster.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # Licensed to the LF AI & Data foundation under one
 # or more contributor license agreements. See the NOTICE file
 # distributed with this work for additional information
@@ -14,14 +16,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-if [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
-        LIBJEMALLOC=$PWD/internal/core/output/lib/libjemalloc.so
-        if test -f "$LIBJEMALLOC"; then
-                #echo "Found $LIBJEMALLOC"
-                export LD_PRELDOAD="$LIBJEMALLOC"
-        else
-                echo "WARN: Cannot find $LIBJEMALLOC"   
-        fi
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+  LIBJEMALLOC=$PWD/internal/core/output/lib/libjemalloc.so
+  if test -f "$LIBJEMALLOC"; then
+    #echo "Found $LIBJEMALLOC"
+    export LD_PRELOAD="$LIBJEMALLOC"
+  else
+    echo "WARN: Cannot find $LIBJEMALLOC"
+  fi
 fi
 
 echo "Starting rootcoord..."
diff --git a/scripts/start_standalone.sh b/scripts/start_standalone.sh
index 98bb1a694a8e64ccd8779fa191312b4ff69ab9ea..31732ba0d34a8684aa2929e93a3fe020855d25f1 100755
--- a/scripts/start_standalone.sh
+++ b/scripts/start_standalone.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 # Licensed to the LF AI & Data foundation under one
 # or more contributor license agreements. See the NOTICE file
 # distributed with this work for additional information
@@ -14,16 +16,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-if [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
 	LIBJEMALLOC=$PWD/internal/core/output/lib/libjemalloc.so
 	if test -f "$LIBJEMALLOC"; then
 		#echo "Found $LIBJEMALLOC"
 		export LD_PRELOAD="$LIBJEMALLOC"
-		echo export LD_PRELOAD="$LIBJEMALLOC"
 	else
-		echo "WARN: Cannot find $LIBJEMALLOC"	
+		echo "WARN: Cannot find $LIBJEMALLOC"
 	fi
-fi	
+fi
 
 echo "Starting standalone..."
 nohup ./bin/milvus run standalone > /tmp/standalone.log 2>&1 &