diff --git a/be/src/common/configbase.cpp b/be/src/common/configbase.cpp
index 093f9173d58c4..e95450e3407bf 100644
--- a/be/src/common/configbase.cpp
+++ b/be/src/common/configbase.cpp
@@ -189,21 +189,19 @@ bool Field::set_value(std::string value) {
         return false;
     }
     StripWhiteSpace(&value);
-    bool flag = parse_value(value);
-    if (flag) {
+    bool success = parse_value(value);
+    if (success) {
+        _last_set_val.swap(_current_set_val);
         _current_set_val = value;
     }
     return flag;
 }
 
-void Field::set_last_update_value() {
-    _last_set_val = _current_set_val;
-}
-
-bool Field::rollback_last_value() {
-    bool flag = parse_value(_last_set_val);
-    if (flag) {
-        _current_set_val = _last_set_val;
+bool Field::rollback() {
+    bool success = parse_value(_last_set_val);
+    if (success) {
+        _current_set_val.swap(_last_set_val);
+        _last_set_val.clear();
     }
     return flag;
 }
@@ -247,7 +245,6 @@ Status set_config(const std::string& field, const std::string& value) {
     if (!it->second->valmutable()) {
         return Status::NotSupported(fmt::format("'{}' is immutable", field));
     }
-    it->second->set_last_update_value();
     if (!it->second->set_value(value)) {
         return Status::InvalidArgument(fmt::format("Invalid value of config '{}': '{}'", field, value));
     }
@@ -260,7 +257,7 @@ Status rollback_config(const std::string& field) {
         return Status::NotFound(fmt::format("'{}' is not found in rollback", field));
     }
 
-    if (!it->second->rollback_last_value()) {
+    if (!it->second->rollback()) {
         return Status::InvalidArgument(fmt::format("Invalid value of config '{}' in rollback", field));
     }
     return Status::OK();
diff --git a/be/src/common/configbase.h b/be/src/common/configbase.h
index 3454b56c69a9d..a87d7966b86da 100644
--- a/be/src/common/configbase.h
+++ b/be/src/common/configbase.h
@@ -142,9 +142,7 @@ class Field {
 
     bool set_value(std::string value);
 
-    bool rollback_last_value();
-
-    void set_last_update_value();
+    bool rollback();
 
     virtual std::string value() const = 0;