diff --git a/apis/kubedb/constants.go b/apis/kubedb/constants.go
index 283d12025b..6501cf0150 100644
--- a/apis/kubedb/constants.go
+++ b/apis/kubedb/constants.go
@@ -1605,6 +1605,16 @@ var (
 	defaultArbiter = core.ResourceRequirements{
 		Requests: core.ResourceList{
 			core.ResourceStorage: resource.MustParse("2Gi"),
+			// these are the default cpu & memory for a coordinator container
+			core.ResourceCPU:    resource.MustParse(".200"),
+			core.ResourceMemory: resource.MustParse("250Mi"),
+		},
+		Limits: core.ResourceList{
+			core.ResourceMemory: resource.MustParse("250Mi"),
+		},
+	}
+	DefaultArbiterMemoryIntensive = core.ResourceRequirements{
+		Requests: core.ResourceList{
 			// these are the default cpu & memory for a coordinator container
 			core.ResourceCPU:    resource.MustParse(".200"),
 			core.ResourceMemory: resource.MustParse("500Mi"),
diff --git a/apis/kubedb/v1/mongodb_helpers.go b/apis/kubedb/v1/mongodb_helpers.go
index a68adf20dd..1f781057ef 100644
--- a/apis/kubedb/v1/mongodb_helpers.go
+++ b/apis/kubedb/v1/mongodb_helpers.go
@@ -735,7 +735,11 @@ func (m *MongoDB) setContainerDefaultValues(container *core.Container, mgVersion
 	defaultResource core.ResourceRequirements, isArbiter ...bool,
 ) {
 	if len(isArbiter) > 0 && isArbiter[0] {
-		m.setContainerDefaultResources(container, kubedb.DefaultArbiter(true))
+		if m.isLaterVersion(mgVersion, 7) {
+			m.setContainerDefaultResources(container, kubedb.DefaultArbiterMemoryIntensive)
+		} else {
+			m.setContainerDefaultResources(container, kubedb.DefaultArbiter(true))
+		}
 	} else {
 		m.setContainerDefaultResources(container, defaultResource)
 	}