diff --git a/oam/install_scripts/columnstore b/oam/install_scripts/columnstore
index bba8ca0fa..1ba4a2c1f 100644
--- a/oam/install_scripts/columnstore
+++ b/oam/install_scripts/columnstore
@@ -129,6 +129,7 @@ stop() {
 	touch ${tmpDir}/StopColumnstore
 	pkill ProcMon
 	pkill ProcMgr
+	$InstallDir/bin/clearShm
 	RETVAL=$?
 	rm -f $lockdir/columnstore
 	fuser -k 8604/tcp > /dev/null 2>&1