diff --git a/internal/proxy/impl.go b/internal/proxy/impl.go
index 1d936d847c..ac9eb9c60a 100644
--- a/internal/proxy/impl.go
+++ b/internal/proxy/impl.go
@@ -2801,6 +2801,7 @@ func (node *Proxy) search(ctx context.Context, request *milvuspb.SearchRequest)
 		node:                   node,
 		lb:                     node.lbPolicy,
 		enableMaterializedView: node.enableMaterializedView,
+		mustUsePartitionKey:    Params.ProxyCfg.MustUsePartitionKey.GetAsBool(),
 	}
 
 	guaranteeTs := request.GuaranteeTimestamp
@@ -2997,11 +2998,12 @@ func (node *Proxy) hybridSearch(ctx context.Context, request *milvuspb.HybridSea
 			),
 			ReqID: paramtable.GetNodeID(),
 		},
-		request: newSearchReq,
-		tr:      timerecord.NewTimeRecorder(method),
-		qc:      node.queryCoord,
-		node:    node,
-		lb:      node.lbPolicy,
+		request:             newSearchReq,
+		tr:                  timerecord.NewTimeRecorder(method),
+		qc:                  node.queryCoord,
+		node:                node,
+		lb:                  node.lbPolicy,
+		mustUsePartitionKey: Params.ProxyCfg.MustUsePartitionKey.GetAsBool(),
 	}
 
 	guaranteeTs := request.GuaranteeTimestamp
@@ -3411,9 +3413,10 @@ func (node *Proxy) Query(ctx context.Context, request *milvuspb.QueryRequest) (*
 			),
 			ReqID: paramtable.GetNodeID(),
 		},
-		request: request,
-		qc:      node.queryCoord,
-		lb:      node.lbPolicy,
+		request:             request,
+		qc:                  node.queryCoord,
+		lb:                  node.lbPolicy,
+		mustUsePartitionKey: Params.ProxyCfg.MustUsePartitionKey.GetAsBool(),
 	}
 	res, err := node.query(ctx, qt)
 	if merr.Ok(res.Status) && err == nil {
diff --git a/internal/proxy/proxy_test.go b/internal/proxy/proxy_test.go
index 679c86b658..ebbfd7e2d5 100644
--- a/internal/proxy/proxy_test.go
+++ b/internal/proxy/proxy_test.go
@@ -1590,6 +1590,14 @@ func TestProxy(t *testing.T) {
 		resp, err := proxy.Search(ctx, req)
 		assert.NoError(t, err)
 		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
+
+		{
+			Params.Save(Params.ProxyCfg.MustUsePartitionKey.Key, "true")
+			resp, err := proxy.Search(ctx, req)
+			assert.NoError(t, err)
+			assert.NotEqual(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
+			Params.Reset(Params.ProxyCfg.MustUsePartitionKey.Key)
+		}
 	})
 
 	constructAdvancedSearchRequest := func() *milvuspb.SearchRequest {
diff --git a/internal/proxy/task.go b/internal/proxy/task.go
index 54a9898e9e..e418c77ce8 100644
--- a/internal/proxy/task.go
+++ b/internal/proxy/task.go
@@ -212,6 +212,12 @@ func (t *createCollectionTask) validatePartitionKey() error {
 		}
 	}
 
+	mustPartitionKey := Params.ProxyCfg.MustUsePartitionKey.GetAsBool()
+	if mustPartitionKey && idx == -1 {
+		return merr.WrapErrParameterInvalidMsg("partition key must be set when creating the collection" +
+			" because the mustUsePartitionKey config is true")
+	}
+
 	if idx == -1 {
 		if t.GetNumPartitions() != 0 {
 			return fmt.Errorf("num_partitions should only be specified with partition key field enabled")
diff --git a/internal/proxy/task_insert.go b/internal/proxy/task_insert.go
index 3f8d3cbc82..77536e874f 100644
--- a/internal/proxy/task_insert.go
+++ b/internal/proxy/task_insert.go
@@ -112,6 +112,13 @@ func (it *insertTask) PreExecute(ctx context.Context) error {
 		return err
 	}
 
+	maxInsertSize := Params.QuotaConfig.MaxInsertSize.GetAsInt()
+	if maxInsertSize != -1 && it.insertMsg.Size() > maxInsertSize {
+		log.Warn("insert request size exceeds maxInsertSize",
+			zap.Int("request size", it.insertMsg.Size()), zap.Int("maxInsertSize", maxInsertSize))
+		return merr.WrapErrParameterTooLarge("insert request size exceeds maxInsertSize")
+	}
+
 	schema, err := globalMetaCache.GetCollectionSchema(ctx, it.insertMsg.GetDbName(), collectionName)
 	if err != nil {
 		log.Warn("get collection schema from global meta cache failed", zap.String("collectionName", collectionName), zap.Error(err))
diff --git a/internal/proxy/task_insert_test.go b/internal/proxy/task_insert_test.go
index 4f7ef10af2..083398ea98 100644
--- a/internal/proxy/task_insert_test.go
+++ b/internal/proxy/task_insert_test.go
@@ -11,6 +11,8 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/v2/msgpb"
 	"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
 	"github.com/milvus-io/milvus/pkg/mq/msgstream"
+	"github.com/milvus-io/milvus/pkg/util/merr"
+	"github.com/milvus-io/milvus/pkg/util/paramtable"
 )
 
 func TestInsertTask_CheckAligned(t *testing.T) {
@@ -285,3 +287,23 @@ func TestInsertTask(t *testing.T) {
 		assert.ElementsMatch(t, channels, it.pChannels)
 	})
 }
+
+func TestMaxInsertSize(t *testing.T) {
+	t.Run("test MaxInsertSize", func(t *testing.T) {
+		paramtable.Init()
+		Params.Save(Params.QuotaConfig.MaxInsertSize.Key, "1")
+		defer Params.Reset(Params.QuotaConfig.MaxInsertSize.Key)
+		it := insertTask{
+			ctx: context.Background(),
+			insertMsg: &msgstream.InsertMsg{
+				InsertRequest: msgpb.InsertRequest{
+					DbName:         "hooooooo",
+					CollectionName: "fooooo",
+				},
+			},
+		}
+		err := it.PreExecute(context.Background())
+		assert.Error(t, err)
+		assert.ErrorIs(t, err, merr.ErrParameterTooLarge)
+	})
+}
diff --git a/internal/proxy/task_query.go b/internal/proxy/task_query.go
index ff7f886df6..618805a4f9 100644
--- a/internal/proxy/task_query.go
+++ b/internal/proxy/task_query.go
@@ -68,6 +68,7 @@ type queryTask struct {
 	reQuery              bool
 	allQueryCnt          int64
 	totalRelatedDataSize int64
+	mustUsePartitionKey  bool
 }
 
 type queryParams struct {
@@ -303,6 +304,10 @@ func (t *queryTask) PreExecute(ctx context.Context) error {
 	if t.partitionKeyMode && len(t.request.GetPartitionNames()) != 0 {
 		return errors.New("not support manually specifying the partition names if partition key mode is used")
 	}
+	if t.mustUsePartitionKey && !t.partitionKeyMode {
+		return merr.WrapErrParameterInvalidMsg("must use partition key in the query request " +
+			"because the mustUsePartitionKey config is true")
+	}
 
 	for _, tag := range t.request.PartitionNames {
 		if err := validatePartitionTag(tag, false); err != nil {
diff --git a/internal/proxy/task_query_test.go b/internal/proxy/task_query_test.go
index 99d6bae869..fddf9e42c4 100644
--- a/internal/proxy/task_query_test.go
+++ b/internal/proxy/task_query_test.go
@@ -170,6 +170,15 @@ func TestQueryTask_all(t *testing.T) {
 	assert.Equal(t, typeutil.ZeroTimestamp, task.TimeoutTimestamp)
 	task.ctx = ctx1
 	assert.NoError(t, task.PreExecute(ctx))
+
+	{
+		task.mustUsePartitionKey = true
+		err := task.PreExecute(ctx)
+		assert.Error(t, err)
+		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
+		task.mustUsePartitionKey = false
+	}
+
 	// after preExecute
 	assert.Greater(t, task.TimeoutTimestamp, typeutil.ZeroTimestamp)
 
diff --git a/internal/proxy/task_search.go b/internal/proxy/task_search.go
index 019e0b7ae8..2863c19d88 100644
--- a/internal/proxy/task_search.go
+++ b/internal/proxy/task_search.go
@@ -61,6 +61,7 @@ type searchTask struct {
 	requery                bool
 	partitionKeyMode       bool
 	enableMaterializedView bool
+	mustUsePartitionKey    bool
 
 	userOutputFields []string
 
@@ -135,6 +136,10 @@ func (t *searchTask) PreExecute(ctx context.Context) error {
 	if t.partitionKeyMode && len(t.request.GetPartitionNames()) != 0 {
 		return errors.New("not support manually specifying the partition names if partition key mode is used")
 	}
+	if t.mustUsePartitionKey && !t.partitionKeyMode {
+		return merr.WrapErrParameterInvalidMsg("must use partition key in the search request " +
+			"because the mustUsePartitionKey config is true")
+	}
 
 	if !t.partitionKeyMode && len(t.request.GetPartitionNames()) > 0 {
 		// translate partition name to partition ids. Use regex-pattern to match partition name.
diff --git a/internal/proxy/task_search_test.go b/internal/proxy/task_search_test.go
index 55c860781a..042d4d4ef7 100644
--- a/internal/proxy/task_search_test.go
+++ b/internal/proxy/task_search_test.go
@@ -328,6 +328,14 @@ func TestSearchTask_PreExecute(t *testing.T) {
 		assert.NoError(t, task.PreExecute(ctx))
 		assert.Greater(t, task.TimeoutTimestamp, typeutil.ZeroTimestamp)
 
+		{
+			task.mustUsePartitionKey = true
+			err = task.PreExecute(ctx)
+			assert.Error(t, err)
+			assert.ErrorIs(t, err, merr.ErrParameterInvalid)
+			task.mustUsePartitionKey = false
+		}
+
 		// field not exist
 		task.ctx = context.TODO()
 		task.request.OutputFields = []string{testInt64Field + funcutil.GenRandomStr()}
diff --git a/internal/proxy/task_test.go b/internal/proxy/task_test.go
index 70dc12ddaa..01250dc0ac 100644
--- a/internal/proxy/task_test.go
+++ b/internal/proxy/task_test.go
@@ -696,6 +696,12 @@ func TestCreateCollectionTask(t *testing.T) {
 		err = task.PreExecute(ctx)
 		assert.NoError(t, err)
 
+		Params.Save(Params.ProxyCfg.MustUsePartitionKey.Key, "true")
+		err = task.PreExecute(ctx)
+		assert.Error(t, err)
+		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
+		Params.Reset(Params.ProxyCfg.MustUsePartitionKey.Key)
+
 		task.Schema = []byte{0x1, 0x2, 0x3, 0x4}
 		err = task.PreExecute(ctx)
 		assert.Error(t, err)
diff --git a/pkg/util/merr/errors.go b/pkg/util/merr/errors.go
index 6790ccd6b7..630f4d02be 100644
--- a/pkg/util/merr/errors.go
+++ b/pkg/util/merr/errors.go
@@ -109,8 +109,9 @@ var (
 	ErrIoUnexpectEOF = newMilvusError("unexpected EOF", 1002, true)
 
 	// Parameter related
-	ErrParameterInvalid = newMilvusError("invalid parameter", 1100, false)
-	ErrParameterMissing = newMilvusError("missing parameter", 1101, false)
+	ErrParameterInvalid  = newMilvusError("invalid parameter", 1100, false)
+	ErrParameterMissing  = newMilvusError("missing parameter", 1101, false)
+	ErrParameterTooLarge = newMilvusError("parameter too large", 1102, false)
 
 	// Metrics related
 	ErrMetricNotFound = newMilvusError("metric not found", 1200, false)
diff --git a/pkg/util/merr/errors_test.go b/pkg/util/merr/errors_test.go
index ff55a70b12..51bc6d854b 100644
--- a/pkg/util/merr/errors_test.go
+++ b/pkg/util/merr/errors_test.go
@@ -136,6 +136,7 @@ func (s *ErrSuite) TestWrap() {
 	s.ErrorIs(WrapErrParameterInvalid(8, 1, "failed to create"), ErrParameterInvalid)
 	s.ErrorIs(WrapErrParameterInvalidRange(1, 1<<16, 0, "topk should be in range"), ErrParameterInvalid)
 	s.ErrorIs(WrapErrParameterMissing("alias_name", "no alias parameter"), ErrParameterMissing)
+	s.ErrorIs(WrapErrParameterTooLarge("unit test"), ErrParameterTooLarge)
 
 	// Metrics related
 	s.ErrorIs(WrapErrMetricNotFound("unknown", "failed to get metric"), ErrMetricNotFound)
diff --git a/pkg/util/merr/utils.go b/pkg/util/merr/utils.go
index 7846d503ce..397aa9cbab 100644
--- a/pkg/util/merr/utils.go
+++ b/pkg/util/merr/utils.go
@@ -863,6 +863,14 @@ func WrapErrParameterMissing[T any](param T, msg ...string) error {
 	return err
 }
 
+func WrapErrParameterTooLarge(name string, msg ...string) error {
+	err := wrapFields(ErrParameterTooLarge, value("message", name))
+	if len(msg) > 0 {
+		err = errors.Wrap(err, strings.Join(msg, "->"))
+	}
+	return err
+}
+
 // Metrics related
 func WrapErrMetricNotFound(name string, msg ...string) error {
 	err := wrapFields(ErrMetricNotFound, value("metric", name))
diff --git a/pkg/util/paramtable/component_param.go b/pkg/util/paramtable/component_param.go
index 6694a600c8..0e2b62129b 100644
--- a/pkg/util/paramtable/component_param.go
+++ b/pkg/util/paramtable/component_param.go
@@ -1011,6 +1011,7 @@ type proxyConfig struct {
 	RetryTimesOnReplica          ParamItem `refreshable:"true"`
 	RetryTimesOnHealthCheck      ParamItem `refreshable:"true"`
 	PartitionNameRegexp          ParamItem `refreshable:"true"`
+	MustUsePartitionKey          ParamItem `refreshable:"true"`
 
 	AccessLog AccessLogConfig
 
@@ -1338,6 +1339,15 @@ please adjust in embedded Milvus: false`,
 	}
 	p.PartitionNameRegexp.Init(base.mgr)
 
+	p.MustUsePartitionKey = ParamItem{
+		Key:          "proxy.mustUsePartitionKey",
+		Version:      "2.4.1",
+		DefaultValue: "false",
+		Doc:          "switch for whether proxy must use partition key for the collection",
+		Export:       true,
+	}
+	p.MustUsePartitionKey.Init(base.mgr)
+
 	p.GracefulStopTimeout = ParamItem{
 		Key:          "proxy.gracefulStopTimeout",
 		Version:      "2.3.7",
diff --git a/pkg/util/paramtable/component_param_test.go b/pkg/util/paramtable/component_param_test.go
index 3f4b90277d..5627e6696c 100644
--- a/pkg/util/paramtable/component_param_test.go
+++ b/pkg/util/paramtable/component_param_test.go
@@ -170,6 +170,10 @@ func TestComponentParam(t *testing.T) {
 
 		params.Save("proxy.gracefulStopTimeout", "100")
 		assert.Equal(t, 100*time.Second, Params.GracefulStopTimeout.GetAsDuration(time.Second))
+
+		assert.False(t, Params.MustUsePartitionKey.GetAsBool())
+		params.Save("proxy.mustUsePartitionKey", "true")
+		assert.True(t, Params.MustUsePartitionKey.GetAsBool())
 	})
 
 	// t.Run("test proxyConfig panic", func(t *testing.T) {
diff --git a/pkg/util/paramtable/quota_param.go b/pkg/util/paramtable/quota_param.go
index 8c108f1ac5..33996a7b77 100644
--- a/pkg/util/paramtable/quota_param.go
+++ b/pkg/util/paramtable/quota_param.go
@@ -128,6 +128,7 @@ type quotaConfig struct {
 	NQLimit                        ParamItem `refreshable:"true"`
 	MaxQueryResultWindow           ParamItem `refreshable:"true"`
 	MaxOutputSize                  ParamItem `refreshable:"true"`
+	MaxInsertSize                  ParamItem `refreshable:"true"`
 	MaxResourceGroupNumOfQueryNode ParamItem `refreshable:"true"`
 
 	// limit writing
@@ -1537,6 +1538,15 @@ Check https://milvus.io/docs/limitations.md for more details.`,
 	}
 	p.MaxOutputSize.Init(base.mgr)
 
+	p.MaxInsertSize = ParamItem{
+		Key:          "quotaAndLimits.limits.maxInsertSize",
+		Version:      "2.4.1",
+		DefaultValue: "-1", // -1 means no limit, the unit is byte
+		Doc:          `maximum size of a single insert request, in bytes, -1 means no limit`,
+		Export:       true,
+	}
+	p.MaxInsertSize.Init(base.mgr)
+
 	p.MaxResourceGroupNumOfQueryNode = ParamItem{
 		Key:          "quotaAndLimits.limits.maxResourceGroupNumOfQueryNode",
 		Version:      "2.4.1",
diff --git a/pkg/util/paramtable/quota_param_test.go b/pkg/util/paramtable/quota_param_test.go
index 0ca8f7006c..14f589a348 100644
--- a/pkg/util/paramtable/quota_param_test.go
+++ b/pkg/util/paramtable/quota_param_test.go
@@ -175,11 +175,16 @@ func TestQuotaParam(t *testing.T) {
 	})
 
 	t.Run("test limits", func(t *testing.T) {
+		params.Init(NewBaseTable(SkipRemote(true)))
 		assert.Equal(t, 65536, qc.MaxCollectionNum.GetAsInt())
 		assert.Equal(t, 65536, qc.MaxCollectionNumPerDB.GetAsInt())
 		assert.Equal(t, 1024, params.QuotaConfig.MaxResourceGroupNumOfQueryNode.GetAsInt())
 		params.Save(params.QuotaConfig.MaxResourceGroupNumOfQueryNode.Key, "512")
 		assert.Equal(t, 512, params.QuotaConfig.MaxResourceGroupNumOfQueryNode.GetAsInt())
+
+		assert.Equal(t, -1, qc.MaxInsertSize.GetAsInt())
+		baseParams.Save(params.QuotaConfig.MaxInsertSize.Key, "1024")
+		assert.Equal(t, 1024, qc.MaxInsertSize.GetAsInt())
 	})
 
 	t.Run("test limit writing", func(t *testing.T) {