diff --git a/pkg/resource_manager/resource_manager.pb.go b/pkg/resource_manager/resource_manager.pb.go
index cb67d8e62..b04b3c30f 100644
--- a/pkg/resource_manager/resource_manager.pb.go
+++ b/pkg/resource_manager/resource_manager.pb.go
@@ -1905,7 +1905,10 @@ func (m *RunawaySettings) GetSwitchGroupName() string {
 }
 
 type BackgroundSettings struct {
-	JobTypes             []string `protobuf:"bytes,1,rep,name=job_types,json=jobTypes,proto3" json:"job_types,omitempty"`
+	// background task types.
+	JobTypes []string `protobuf:"bytes,1,rep,name=job_types,json=jobTypes,proto3" json:"job_types,omitempty"`
+	// the percentage limit of total resource(cpu/io) that background tasks can use.
+	UtilizationLimit     uint64   `protobuf:"varint,2,opt,name=utilization_limit,json=utilizationLimit,proto3" json:"utilization_limit,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -1951,6 +1954,13 @@ func (m *BackgroundSettings) GetJobTypes() []string {
 	return nil
 }
 
+func (m *BackgroundSettings) GetUtilizationLimit() uint64 {
+	if m != nil {
+		return m.UtilizationLimit
+	}
+	return 0
+}
+
 type Participant struct {
 	// name is the unique name of the resource manager participant.
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
@@ -2059,123 +2069,124 @@ func init() {
 func init() { proto.RegisterFile("resource_manager.proto", fileDescriptor_7048dd9233ee965d) }
 
 var fileDescriptor_7048dd9233ee965d = []byte{
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+	0x42, 0xfd, 0x7c, 0x41, 0xa2, 0x05, 0xa8, 0x2a, 0x60, 0x4d, 0xa8, 0xcf, 0xa1, 0x2a, 0x14, 0x1f,
+	0xbf, 0x21, 0xbe, 0x34, 0x0e, 0x1d, 0xb1, 0x1e, 0x0b, 0x08, 0x37, 0xa8, 0x87, 0x01, 0x09, 0xeb,
+	0xf9, 0xad, 0x3f, 0x16, 0x55, 0x9a, 0x4c, 0x22, 0x0e, 0x4c, 0xb5, 0xa0, 0x53, 0x40, 0x93, 0x4f,
+	0x5c, 0xe8, 0xc1, 0x64, 0x59, 0xcd, 0x7c, 0x4a, 0x6b, 0x7e, 0xef, 0x6a, 0xc2, 0xe6, 0x6f, 0xc5,
+	0x9d, 0x43, 0x5d, 0xa8, 0x9f, 0x7f, 0x5f, 0x42, 0xf7, 0xa7, 0x9c, 0xcf, 0xd3, 0xdf, 0xbc, 0x9a,
+	0x1b, 0x57, 0x11, 0xcd, 0x1a, 0x7b, 0xd4, 0x6e, 0x5f, 0x6a, 0x6c, 0xc6, 0xf3, 0xcd, 0x34, 0x63,
+	0xb3, 0xde, 0x65, 0xdc, 0x39, 0x14, 0xc2, 0xca, 0x41, 0xd4, 0x66, 0x2f, 0x87, 0xff, 0x27, 0x7b,
+	0x12, 0x56, 0xa6, 0xbc, 0x6c, 0xa1, 0x29, 0x1b, 0x32, 0xfb, 0x39, 0xad, 0xf9, 0xc9, 0x15, 0xa5,
+	0x53, 0xab, 0xaf, 0x61, 0xe5, 0x91, 0x7f, 0x1a, 0x33, 0x9e, 0xfd, 0x6f, 0x11, 0xe8, 0xe2, 0x1f,
+	0xda, 0xb4, 0x5a, 0xee, 0x5d, 0x26, 0x96, 0xd8, 0x59, 0x77, 0x3e, 0x75, 0x76, 0x56, 0xff, 0xf1,
+	0xfb, 0x8a, 0xf3, 0xb7, 0xb7, 0x6b, 0xce, 0xdf, 0xdf, 0xae, 0x39, 0xff, 0x7a, 0xbb, 0xe6, 0xfc,
+	0xee, 0xdf, 0x6b, 0x73, 0x27, 0x25, 0xfd, 0xc0, 0xfb, 0xfd, 0xff, 0x05, 0x00, 0x00, 0xff, 0xff,
+	0x4b, 0xc9, 0x18, 0x5c, 0x33, 0x16, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -3929,6 +3940,11 @@ func (m *BackgroundSettings) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
+	if m.UtilizationLimit != 0 {
+		i = encodeVarintResourceManager(dAtA, i, uint64(m.UtilizationLimit))
+		i--
+		dAtA[i] = 0x10
+	}
 	if len(m.JobTypes) > 0 {
 		for iNdEx := len(m.JobTypes) - 1; iNdEx >= 0; iNdEx-- {
 			i -= len(m.JobTypes[iNdEx])
@@ -4643,6 +4659,9 @@ func (m *BackgroundSettings) Size() (n int) {
 			n += 1 + l + sovResourceManager(uint64(l))
 		}
 	}
+	if m.UtilizationLimit != 0 {
+		n += 1 + sovResourceManager(uint64(m.UtilizationLimit))
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -8111,6 +8130,25 @@ func (m *BackgroundSettings) Unmarshal(dAtA []byte) error {
 			}
 			m.JobTypes = append(m.JobTypes, string(dAtA[iNdEx:postIndex]))
 			iNdEx = postIndex
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field UtilizationLimit", wireType)
+			}
+			m.UtilizationLimit = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowResourceManager
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.UtilizationLimit |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
 		default:
 			iNdEx = preIndex
 			skippy, err := skipResourceManager(dAtA[iNdEx:])
diff --git a/proto/resource_manager.proto b/proto/resource_manager.proto
index f368f533d..2b670be0d 100644
--- a/proto/resource_manager.proto
+++ b/proto/resource_manager.proto
@@ -231,7 +231,10 @@ message RunawaySettings {
 }
 
 message BackgroundSettings {
-  repeated string job_types = 1; 
+  // background task types.
+  repeated string job_types = 1;
+  // the percentage limit of total resource(cpu/io) that background tasks can use.
+  uint64 utilization_limit = 2;
 }
 
 message Participant {
diff --git a/scripts/proto.lock b/scripts/proto.lock
index d534f1acb..02344e3e2 100644
--- a/scripts/proto.lock
+++ b/scripts/proto.lock
@@ -19801,6 +19801,11 @@
                 "name": "job_types",
                 "type": "string",
                 "is_repeated": true
+              },
+              {
+                "id": 2,
+                "name": "utilization_limit",
+                "type": "uint64"
               }
             ]
           },