diff --git a/pkg/mgmt/volume/start.go b/pkg/mgmt/volume/start.go
index c4fdef72..e57a149f 100644
--- a/pkg/mgmt/volume/start.go
+++ b/pkg/mgmt/volume/start.go
@@ -74,7 +74,7 @@ func Start(controllerMtx *sync.RWMutex, stopCh <-chan struct{}) error {
 	go VolInformerFactory.Start(stopCh)
 	klog.Info("Starting Lvm volume controller")
 	// Threadiness defines the number of workers to be launched in Run function
-	return controller.Run(2, stopCh)
+	return controller.Run(1, stopCh)
 }
 
 // GetClusterConfig return the config for k8s.
diff --git a/pkg/mgmt/volume/volume.go b/pkg/mgmt/volume/volume.go
index 877b79fd..ed23594f 100644
--- a/pkg/mgmt/volume/volume.go
+++ b/pkg/mgmt/volume/volume.go
@@ -259,9 +259,9 @@ func (c *VolController) getVgPriorityList(vol *apis.LVMVolume) ([]apis.VolumeGro
 		filteredVgs = append(filteredVgs, vg)
 	}
 
-	// prioritize the volume group having less free space available.
+	// prioritize the volume group having most free space available.
 	sort.SliceStable(filteredVgs, func(i, j int) bool {
-		return filteredVgs[i].Free.Cmp(filteredVgs[j].Free) < 0
+		return filteredVgs[i].Free.Cmp(filteredVgs[j].Free) > 0
 	})
 	return filteredVgs, nil
 }