diff --git a/.gitignore b/.gitignore
index 59a1dbe579..f17a9b5aba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 **/cmake-build-release/*
 **/cmake_build_release/*
 **/cmake_build/*
+.cache
 
 internal/core/output/*
 internal/core/build/*
@@ -87,4 +88,4 @@ deployments/docker/*/volumes
 
 # rocksdb
 cwrapper_rocksdb_build/
-internal/kv/rocksdb/cwrapper/
\ No newline at end of file
+internal/kv/rocksdb/cwrapper/
diff --git a/internal/proxy/task.go b/internal/proxy/task.go
index 7d4ed4cbd8..7e671d52a8 100644
--- a/internal/proxy/task.go
+++ b/internal/proxy/task.go
@@ -51,17 +51,19 @@ import (
 )
 
 const (
+	AnnsFieldKey    = "anns_field"
+	TopKKey         = "topk"
+	MetricTypeKey   = "metric_type"
+	SearchParamsKey = "params"
+	RoundDecimalKey = "round_decimal"
+	OffsetKey       = "offset"
+
 	InsertTaskName                  = "InsertTask"
 	CreateCollectionTaskName        = "CreateCollectionTask"
 	DropCollectionTaskName          = "DropCollectionTask"
 	SearchTaskName                  = "SearchTask"
 	RetrieveTaskName                = "RetrieveTask"
 	QueryTaskName                   = "QueryTask"
-	AnnsFieldKey                    = "anns_field"
-	TopKKey                         = "topk"
-	MetricTypeKey                   = "metric_type"
-	SearchParamsKey                 = "params"
-	RoundDecimalKey                 = "round_decimal"
 	HasCollectionTaskName           = "HasCollectionTask"
 	DescribeCollectionTaskName      = "DescribeCollectionTask"
 	GetCollectionStatisticsTaskName = "GetCollectionStatisticsTask"
diff --git a/internal/proxy/task_search.go b/internal/proxy/task_search.go
index 7a0eeee3f5..24e59d0dd1 100644
--- a/internal/proxy/task_search.go
+++ b/internal/proxy/task_search.go
@@ -93,10 +93,13 @@ func parseQueryInfo(searchParamsPair []*commonpb.KeyValuePair) (*planpb.QueryInf
 	if err != nil {
 		return nil, errors.New(TopKKey + " not found in search_params")
 	}
-	topK, err := strconv.Atoi(topKStr)
+	topK, err := strconv.ParseInt(topKStr, 0, 64)
 	if err != nil {
 		return nil, fmt.Errorf("%s [%s] is invalid", TopKKey, topKStr)
 	}
+	if err := validateTopK(topK); err != nil {
+		return nil, fmt.Errorf("invalid limit, %w", err)
+	}
 
 	metricType, err := funcutil.GetAttrByKeyFromRepeatedKV(MetricTypeKey, searchParamsPair)
 	if err != nil {
@@ -112,7 +115,7 @@ func parseQueryInfo(searchParamsPair []*commonpb.KeyValuePair) (*planpb.QueryInf
 	if err != nil {
 		roundDecimalStr = "-1"
 	}
-	roundDecimal, err := strconv.Atoi(roundDecimalStr)
+	roundDecimal, err := strconv.ParseInt(roundDecimalStr, 0, 64)
 	if err != nil {
 		return nil, fmt.Errorf("%s [%s] is invalid, should be -1 or an integer in range [0, 6]", RoundDecimalKey, roundDecimalStr)
 	}
@@ -122,10 +125,10 @@ func parseQueryInfo(searchParamsPair []*commonpb.KeyValuePair) (*planpb.QueryInf
 	}
 
 	return &planpb.QueryInfo{
-		Topk:         int64(topK),
+		Topk:         topK,
 		MetricType:   metricType,
 		SearchParams: searchParams,
-		RoundDecimal: int64(roundDecimal),
+		RoundDecimal: roundDecimal,
 	}, nil
 }
 
@@ -242,6 +245,7 @@ func (t *searchTask) PreExecute(ctx context.Context) error {
 		t.SearchRequest.OutputFieldsId = outputFieldIDs
 		plan.OutputFieldIds = outputFieldIDs
 
+		t.SearchRequest.Topk = queryInfo.GetTopk()
 		t.SearchRequest.MetricType = queryInfo.GetMetricType()
 		t.SearchRequest.DslType = commonpb.DslType_BoolExprV1
 		t.SearchRequest.SerializedExprPlan, err = proto.Marshal(plan)
@@ -249,10 +253,6 @@ func (t *searchTask) PreExecute(ctx context.Context) error {
 			return err
 		}
 
-		t.SearchRequest.Topk = queryInfo.GetTopk()
-		if err := validateTopK(queryInfo.GetTopk()); err != nil {
-			return err
-		}
 		log.Ctx(ctx).Debug("Proxy::searchTask::PreExecute", zap.Int64("msgID", t.ID()),
 			zap.Int64s("plan.OutputFieldIds", plan.GetOutputFieldIds()),
 			zap.String("plan", plan.String())) // may be very large if large term passed.
@@ -647,18 +647,6 @@ func reduceSearchResultData(ctx context.Context, searchResultData []*schemapb.Se
 //	}
 //}
 
-// func printSearchResult(partialSearchResult *internalpb.SearchResults) {
-//     for i := 0; i < len(partialSearchResult.Hits); i++ {
-//         testHits := milvuspb.Hits{}
-//         err := proto.Unmarshal(partialSearchResult.Hits[i], &testHits)
-//         if err != nil {
-//             panic(err)
-//         }
-//         fmt.Println(testHits.IDs)
-//         fmt.Println(testHits.Scores)
-//     }
-// }
-
 func (t *searchTask) TraceCtx() context.Context {
 	return t.ctx
 }
diff --git a/internal/proxy/task_search_test.go b/internal/proxy/task_search_test.go
index 460ba33f8a..42394942b9 100644
--- a/internal/proxy/task_search_test.go
+++ b/internal/proxy/task_search_test.go
@@ -1697,6 +1697,11 @@ func TestTaskSearch_parseQueryInfo(t *testing.T) {
 			Value: "invalid",
 		})
 
+		spInvalidTopk65536 := append(spNoTopk, &commonpb.KeyValuePair{
+			Key:   TopKKey,
+			Value: "65536",
+		})
+
 		spNoMetricType := append(spNoTopk, &commonpb.KeyValuePair{
 			Key:   TopKKey,
 			Value: "10",
@@ -1727,6 +1732,7 @@ func TestTaskSearch_parseQueryInfo(t *testing.T) {
 		}{
 			{"No_topk", spNoTopk},
 			{"Invalid_topk", spInvalidTopk},
+			{"Invalid_topk_65536", spInvalidTopk65536},
 			{"No_Metric_type", spNoMetricType},
 			{"No_search_params", spNoSearchParams},
 			{"Invalid_round_decimal", spInvalidRoundDecimal},