diff --git a/core/src/db/DBImpl.cpp b/core/src/db/DBImpl.cpp
index a915c69e7e..6df8489bf6 100644
--- a/core/src/db/DBImpl.cpp
+++ b/core/src/db/DBImpl.cpp
@@ -517,6 +517,8 @@ DBImpl::Insert(const std::string& collection_name, const std::string& partition_
 
     // generate id
     if (auto_genid) {
+        LOG_SERVER_DEBUG_ << "Auto generate entities id";
+
         SafeIDGenerator& id_generator = SafeIDGenerator::GetInstance();
         IDNumbers ids;
         STATUS_CHECK(id_generator.GetNextIDNumbers(consume_chunk->count_, ids));
@@ -541,6 +543,7 @@ DBImpl::Insert(const std::string& collection_name, const std::string& partition_
     std::vector<DataChunkPtr> chunks;
     STATUS_CHECK(utils::SplitChunk(consume_chunk, segment_row_count, chunks));
 
+    LOG_ENGINE_DEBUG_ << "Insert entities into mem manager";
     for (auto& chunk : chunks) {
         auto status = mem_mgr_->InsertEntities(collection_id, partition_id, chunk, op_id);
         if (!status.ok()) {
diff --git a/core/src/db/Utils.cpp b/core/src/db/Utils.cpp
index 991f680289..223a7ef48a 100644
--- a/core/src/db/Utils.cpp
+++ b/core/src/db/Utils.cpp
@@ -215,6 +215,8 @@ SplitChunk(const DataChunkPtr& chunk, int64_t segment_row_count, std::vector<Dat
         }
     }
 
+    LOG_SERVER_DEBUG_ << "Split chunk since the chunk row count greater than segment_row_limit";
+
     // secondly, copy new chunk
     int64_t copied_count = 0;
     while (copied_count < chunk_count) {
@@ -249,6 +251,11 @@ SplitChunk(const DataChunkPtr& chunk, int64_t segment_row_count, std::vector<Dat
         chunks.emplace_back(new_chunk);
     }
 
+    // data has been copied, do this to free memory
+    chunk->fixed_fields_.clear();
+    chunk->variable_fields_.clear();
+    chunk->count_ = 0;
+
     return Status::OK();
 }
 
diff --git a/core/src/db/insert/MemCollection.cpp b/core/src/db/insert/MemCollection.cpp
index 8451490e7e..6b30a40c60 100644
--- a/core/src/db/insert/MemCollection.cpp
+++ b/core/src/db/insert/MemCollection.cpp
@@ -171,7 +171,7 @@ MemCollection::ApplyDeleteToFile() {
         segment::SegmentReaderPtr segment_reader =
             std::make_shared<segment::SegmentReader>(options_.meta_.path_, seg_visitor);
 
-        // Step 1: Check to-delete id possibly in this segment
+        // Step 1: Check to-delete id possissbly in this segment
         std::unordered_set<idx_t> ids_to_check;
         segment::IdBloomFilterPtr pre_bloom_filter;
         STATUS_CHECK(segment_reader->LoadBloomFilter(pre_bloom_filter));
diff --git a/core/src/db/wal/WalProxy.cpp b/core/src/db/wal/WalProxy.cpp
index 4146e35fa2..899e81189a 100644
--- a/core/src/db/wal/WalProxy.cpp
+++ b/core/src/db/wal/WalProxy.cpp
@@ -99,12 +99,6 @@ WalProxy::Insert(const std::string& collection_name, const std::string& partitio
     // split chunk accordding to segment row count
     std::vector<DataChunkPtr> chunks;
     STATUS_CHECK(utils::SplitChunk(data_chunk, row_count_per_segment, chunks));
-    if (chunks.size() > 0 && data_chunk != chunks[0]) {
-        // data has been copied to new chunk, do this to free memory
-        data_chunk->fixed_fields_.clear();
-        data_chunk->variable_fields_.clear();
-        data_chunk->count_ = 0;
-    }
 
     // write operation into wal file, and insert to memory
     for (auto& chunk : chunks) {
diff --git a/core/src/server/ValidationUtil.cpp b/core/src/server/ValidationUtil.cpp
index 44c932fbb7..e682752169 100644
--- a/core/src/server/ValidationUtil.cpp
+++ b/core/src/server/ValidationUtil.cpp
@@ -491,8 +491,14 @@ ValidatePartitionTags(const std::vector<std::string>& partition_tags) {
 }
 
 Status
-ValidateInsertDataSize(const engine::DataChunkPtr& data) {
-    int64_t chunk_size = engine::utils::GetSizeOfChunk(data);
+ValidateInsertDataSize(const InsertParam& insert_param) {
+    int64_t chunk_size = 0;
+    for (auto& pair : insert_param.fields_data_) {
+        for (auto& data : pair.second) {
+            chunk_size += data.second;
+        }
+    }
+
     if (chunk_size > engine::MAX_INSERT_DATA_SIZE) {
         std::string msg = "The amount of data inserted each time cannot exceed " +
                           std::to_string(engine::MAX_INSERT_DATA_SIZE / engine::MB) + " MB";
diff --git a/core/src/server/ValidationUtil.h b/core/src/server/ValidationUtil.h
index 06eca4d073..b2a303730b 100644
--- a/core/src/server/ValidationUtil.h
+++ b/core/src/server/ValidationUtil.h
@@ -12,6 +12,7 @@
 #pragma once
 
 #include "db/Types.h"
+#include "server/delivery/request/Types.h"
 #include "utils/Json.h"
 #include "utils/Status.h"
 
@@ -56,7 +57,7 @@ extern Status
 ValidatePartitionTags(const std::vector<std::string>& partition_tags);
 
 extern Status
-ValidateInsertDataSize(const engine::DataChunkPtr& data);
+ValidateInsertDataSize(const InsertParam& insert_param);
 
 extern Status
 ValidateCompactThreshold(double threshold);
diff --git a/core/src/server/delivery/ReqHandler.cpp b/core/src/server/delivery/ReqHandler.cpp
index 5de4333dee..6a5e0a1e67 100644
--- a/core/src/server/delivery/ReqHandler.cpp
+++ b/core/src/server/delivery/ReqHandler.cpp
@@ -150,8 +150,8 @@ ReqHandler::DropIndex(const ContextPtr& context, const std::string& collection_n
 
 Status
 ReqHandler::Insert(const ContextPtr& context, const std::string& collection_name, const std::string& partition_name,
-                   const int64_t& row_count, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data) {
-    BaseReqPtr req_ptr = InsertReq::Create(context, collection_name, partition_name, row_count, chunk_data);
+                   InsertParam& insert_param) {
+    BaseReqPtr req_ptr = InsertReq::Create(context, collection_name, partition_name, insert_param);
     ReqScheduler::ExecReq(req_ptr);
     return req_ptr->status();
 }
diff --git a/core/src/server/delivery/ReqHandler.h b/core/src/server/delivery/ReqHandler.h
index c02c84c5ef..0da7e4ceb6 100644
--- a/core/src/server/delivery/ReqHandler.h
+++ b/core/src/server/delivery/ReqHandler.h
@@ -80,7 +80,7 @@ class ReqHandler {
 
     Status
     Insert(const ContextPtr& context, const std::string& collection_name, const std::string& partition_name,
-           const int64_t& row_count, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data);
+           InsertParam& insert_param);
 
     Status
     GetEntityByID(const ContextPtr& context, const std::string& collection_name, const engine::IDNumbers& ids,
diff --git a/core/src/server/delivery/request/InsertReq.cpp b/core/src/server/delivery/request/InsertReq.cpp
index 2f90f4be56..18677e20ac 100644
--- a/core/src/server/delivery/request/InsertReq.cpp
+++ b/core/src/server/delivery/request/InsertReq.cpp
@@ -32,56 +32,79 @@
 namespace milvus {
 namespace server {
 
+namespace {
+Status
+ConvertToChunk(const InsertParam& insert_param, engine::DataChunkPtr& data_chunk) {
+    TimeRecorderAuto rc("Copy insert data to chunk");
+    data_chunk = std::make_shared<engine::DataChunk>();
+    data_chunk->count_ = insert_param.row_count_;
+    for (auto& pair : insert_param.fields_data_) {
+        engine::BinaryDataPtr bin = std::make_shared<engine::BinaryData>();
+
+        // calculate data size
+        int64_t bytes = 0;
+        for (auto& data_segment : pair.second) {
+            bytes += data_segment.second;
+        }
+        bin->data_.resize(bytes);
+
+        // copy data
+        int64_t offset = 0;
+        for (auto& data_segment : pair.second) {
+            memcpy(bin->data_.data() + offset, data_segment.first, data_segment.second);
+            offset += data_segment.second;
+        }
+
+        data_chunk->fixed_fields_.insert(std::make_pair(pair.first, bin));
+    }
+
+    return Status::OK();
+}
+}  // namespace
+
 InsertReq::InsertReq(const ContextPtr& context, const std::string& collection_name, const std::string& partition_name,
-                     const int64_t& row_count, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data)
+                     InsertParam& insert_param)
     : BaseReq(context, ReqType::kInsert),
       collection_name_(collection_name),
       partition_name_(partition_name),
-      row_count_(row_count),
-      chunk_data_(chunk_data) {
+      insert_param_(insert_param) {
 }
 
 BaseReqPtr
 InsertReq::Create(const ContextPtr& context, const std::string& collection_name, const std::string& partition_name,
-                  const int64_t& row_count, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data) {
-    return std::shared_ptr<BaseReq>(new InsertReq(context, collection_name, partition_name, row_count, chunk_data));
+                  InsertParam& insert_param) {
+    return std::shared_ptr<BaseReq>(new InsertReq(context, collection_name, partition_name, insert_param));
 }
 
 Status
 InsertReq::OnExecute() {
     LOG_SERVER_INFO_ << LogOut("[%s][%ld] ", "insert", 0) << "Execute InsertReq.";
     try {
-        std::string hdr = "InsertReq(table=" + collection_name_ + ", partition_name=" + partition_name_ + ")";
+        std::string hdr = "InsertReq(collection=" + collection_name_ + ", partition_name=" + partition_name_ + ")";
         TimeRecorder rc(hdr);
 
-        if (chunk_data_.empty()) {
-            return Status{SERVER_INVALID_ARGUMENT,
-                          "The vector field is empty, Make sure you have entered vector records"};
+        if (insert_param_.row_count_ == 0 || insert_param_.fields_data_.empty()) {
+            return Status{SERVER_INVALID_ARGUMENT, "The field is empty, make sure you have entered entities"};
         }
 
         // step 1: check collection existence
         bool exist = false;
         STATUS_CHECK(DBWrapper::DB()->HasCollection(collection_name_, exist));
         if (!exist) {
-            return Status(SERVER_COLLECTION_NOT_EXIST, "Collection not exist: " + collection_name_);
+            return Status(SERVER_COLLECTION_NOT_EXIST, "Collection doesn't exist: " + collection_name_);
         }
 
-        // step 2: construct insert data
-        engine::DataChunkPtr data_chunk = std::make_shared<engine::DataChunk>();
-        data_chunk->count_ = row_count_;
-        for (auto& pair : chunk_data_) {
-            engine::BinaryDataPtr bin = std::make_shared<engine::BinaryData>();
-            bin->data_.swap(pair.second);
-            data_chunk->fixed_fields_.insert(std::make_pair(pair.first, bin));
-        }
-
-        // step 3: check insert data limitation
-        auto status = ValidateInsertDataSize(data_chunk);
+        // step 2: check insert data limitation
+        auto status = ValidateInsertDataSize(insert_param_);
         if (!status.ok()) {
             LOG_SERVER_ERROR_ << LogOut("[%s][%d] Invalid vector data: %s", "insert", 0, status.message().c_str());
             return status;
         }
 
+        // step 3: construct insert data
+        engine::DataChunkPtr data_chunk;
+        STATUS_CHECK(ConvertToChunk(insert_param_, data_chunk));
+
         // step 4: insert data into db
         status = DBWrapper::DB()->Insert(collection_name_, partition_name_, data_chunk);
         if (!status.ok()) {
@@ -94,7 +117,10 @@ InsertReq::OnExecute() {
         if (iter == data_chunk->fixed_fields_.end() || iter->second == nullptr) {
             return Status(SERVER_UNEXPECTED_ERROR, "Insert action return empty id array");
         }
-        chunk_data_[engine::FIELD_UID] = iter->second->data_;
+
+        int64_t num = iter->second->data_.size() / sizeof(int64_t);
+        insert_param_.id_returned_.resize(num);
+        memcpy(insert_param_.id_returned_.data(), iter->second->data_.data(), iter->second->data_.size());
 
         rc.ElapseFromBegin("done");
     } catch (std::exception& ex) {
diff --git a/core/src/server/delivery/request/InsertReq.h b/core/src/server/delivery/request/InsertReq.h
index a6eac001d3..5a48f30b3f 100644
--- a/core/src/server/delivery/request/InsertReq.h
+++ b/core/src/server/delivery/request/InsertReq.h
@@ -25,11 +25,11 @@ class InsertReq : public BaseReq {
  public:
     static BaseReqPtr
     Create(const ContextPtr& context, const std::string& collection_name, const std::string& partition_name,
-           const int64_t& row_count, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data);
+           InsertParam& insert_param);
 
  protected:
     InsertReq(const ContextPtr& context, const std::string& collection_name, const std::string& partition_name,
-              const int64_t& row_count, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data);
+              InsertParam& insert_param);
 
     Status
     OnExecute() override;
@@ -37,8 +37,7 @@ class InsertReq : public BaseReq {
  private:
     const std::string collection_name_;
     const std::string partition_name_;
-    const int64_t row_count_;
-    std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data_;
+    InsertParam& insert_param_;
 };
 
 }  // namespace server
diff --git a/core/src/server/delivery/request/Types.h b/core/src/server/delivery/request/Types.h
index bf6e0cd339..8bd627b112 100644
--- a/core/src/server/delivery/request/Types.h
+++ b/core/src/server/delivery/request/Types.h
@@ -85,6 +85,20 @@ struct IndexParam {
     }
 };
 
+struct InsertParam {
+    using DataSegment = std::pair<const char*, int64_t>;
+    using DataSegments = std::vector<DataSegment>;
+    using FieldDataMap = std::unordered_map<std::string, DataSegments>;
+
+    // for the purpose to avoid data copy
+    // the fields_data_ only pass data address, makesure all data address are keep alive
+    FieldDataMap fields_data_;
+    int64_t row_count_ = 0;
+
+    // to return entities id
+    std::vector<int64_t> id_returned_;
+};
+
 enum class ReqType {
     // general operations
     kCmd = 0,
diff --git a/core/src/server/grpc_impl/GrpcRequestHandler.cpp b/core/src/server/grpc_impl/GrpcRequestHandler.cpp
index 26d3be907d..2ef80eb3bb 100644
--- a/core/src/server/grpc_impl/GrpcRequestHandler.cpp
+++ b/core/src/server/grpc_impl/GrpcRequestHandler.cpp
@@ -93,35 +93,33 @@ RequestMap(ReqType req_type) {
 }
 
 namespace {
+template <typename T>
 void
-CopyVectorData(const google::protobuf::RepeatedPtrField<::milvus::grpc::VectorRowRecord>& grpc_records,
-               std::vector<uint8_t>& vectors_data) {
-    // calculate buffer size
+RecordDataAddr(const std::string& field_name, int32_t num, const T* data, InsertParam& insert_param) {
+    int64_t bytes = num * sizeof(T);
+    const char* data_addr = reinterpret_cast<const char*>(data);
+    auto data_segment = std::make_pair(data_addr, bytes);
+    insert_param.fields_data_[field_name].emplace_back(data_segment);
+}
+
+void
+RecordVectorDataAddr(const std::string& field_name,
+                     const google::protobuf::RepeatedPtrField<::milvus::grpc::VectorRowRecord>& grpc_records,
+                     InsertParam& insert_param) {
+    // calculate data size
     int64_t float_data_size = 0, binary_data_size = 0;
     for (auto& record : grpc_records) {
         float_data_size += record.float_data_size();
         binary_data_size += record.binary_data().size();
     }
 
-    int64_t data_size = binary_data_size;
-    if (float_data_size > 0) {
-        data_size = float_data_size * sizeof(float);
-    }
-
-    // copy vector data
-    vectors_data.resize(data_size);
-    int64_t offset = 0;
     if (float_data_size > 0) {
         for (auto& record : grpc_records) {
-            int64_t single_size = record.float_data_size() * sizeof(float);
-            memcpy(&vectors_data[offset], record.float_data().data(), single_size);
-            offset += single_size;
+            RecordDataAddr<float>(field_name, record.float_data_size(), record.float_data().data(), insert_param);
         }
     } else if (binary_data_size > 0) {
         for (auto& record : grpc_records) {
-            int64_t single_size = record.binary_data().size();
-            memcpy(&vectors_data[offset], record.binary_data().data(), single_size);
-            offset += single_size;
+            RecordDataAddr<char>(field_name, record.binary_data().size(), record.binary_data().data(), insert_param);
         }
     }
 }
@@ -1321,10 +1319,6 @@ GrpcRequestHandler::Insert(::grpc::ServerContext* context, const ::milvus::grpc:
         }
     }
 
-    auto field_size = request->fields_size();
-
-    std::unordered_map<std::string, std::vector<uint8_t>> chunk_data;
-
     auto valid_row_count = [&](int32_t& base, int32_t test) -> bool {
         if (base < 0) {
             base = test;
@@ -1341,8 +1335,10 @@ GrpcRequestHandler::Insert(::grpc::ServerContext* context, const ::milvus::grpc:
         return true;
     };
 
-    // copy field data
+    // construct insert parameter
+    InsertParam insert_param;
     int32_t row_num = -1;
+    auto field_size = request->fields_size();
     for (int i = 0; i < field_size; i++) {
         auto grpc_int32_size = request->fields(i).attr_record().int32_value_size();
         auto grpc_int64_size = request->fields(i).attr_record().int64_value_size();
@@ -1351,62 +1347,57 @@ GrpcRequestHandler::Insert(::grpc::ServerContext* context, const ::milvus::grpc:
         const auto& field = request->fields(i);
         auto& field_name = field.field_name();
 
-        std::vector<uint8_t> temp_data;
         if (grpc_int32_size > 0) {
             if (!valid_row_count(row_num, grpc_int32_size)) {
                 return ::grpc::Status::OK;
             }
-            temp_data.resize(grpc_int32_size * sizeof(int32_t));
-            memcpy(temp_data.data(), field.attr_record().int32_value().data(), grpc_int32_size * sizeof(int32_t));
+            RecordDataAddr<int32_t>(field_name, grpc_int32_size, field.attr_record().int32_value().data(),
+                                    insert_param);
         } else if (grpc_int64_size > 0) {
             if (!valid_row_count(row_num, grpc_int64_size)) {
                 return ::grpc::Status::OK;
             }
-            temp_data.resize(grpc_int64_size * sizeof(int64_t));
-            memcpy(temp_data.data(), field.attr_record().int64_value().data(), grpc_int64_size * sizeof(int64_t));
+            RecordDataAddr<int64_t>(field_name, grpc_int64_size, field.attr_record().int64_value().data(),
+                                    insert_param);
         } else if (grpc_float_size > 0) {
             if (!valid_row_count(row_num, grpc_float_size)) {
                 return ::grpc::Status::OK;
             }
-            temp_data.resize(grpc_float_size * sizeof(float));
-            memcpy(temp_data.data(), field.attr_record().float_value().data(), grpc_float_size * sizeof(float));
+            RecordDataAddr<float>(field_name, grpc_float_size, field.attr_record().float_value().data(), insert_param);
         } else if (grpc_double_size > 0) {
             if (!valid_row_count(row_num, grpc_double_size)) {
                 return ::grpc::Status::OK;
             }
-            temp_data.resize(grpc_double_size * sizeof(double));
-            memcpy(temp_data.data(), field.attr_record().double_value().data(), grpc_double_size * sizeof(double));
+            RecordDataAddr<double>(field_name, grpc_double_size, field.attr_record().double_value().data(),
+                                   insert_param);
         } else {
             if (!valid_row_count(row_num, field.vector_record().records_size())) {
                 return ::grpc::Status::OK;
             }
-            CopyVectorData(field.vector_record().records(), temp_data);
+            RecordVectorDataAddr(field_name, field.vector_record().records(), insert_param);
         }
-
-        chunk_data.insert(std::make_pair(field_name, temp_data));
     }
+    insert_param.row_count_ = row_num;
 
     // copy id array
     if (request->entity_id_array_size() > 0) {
-        int64_t size = request->entity_id_array_size() * sizeof(int64_t);
-        std::vector<uint8_t> temp_data(size, 0);
-        memcpy(temp_data.data(), request->entity_id_array().data(), size);
-        chunk_data.insert(std::make_pair(engine::FIELD_UID, temp_data));
+        RecordDataAddr<int64_t>(engine::FIELD_UID, request->entity_id_array_size(), request->entity_id_array().data(),
+                                insert_param);
     }
 
     std::string collection_name = request->collection_name();
     std::string partition_name = request->partition_tag();
-    Status status = req_handler_.Insert(GetContext(context), collection_name, partition_name, row_num, chunk_data);
+    Status status = req_handler_.Insert(GetContext(context), collection_name, partition_name, insert_param);
     if (!status.ok()) {
         SET_RESPONSE(response->mutable_status(), status, context);
         return ::grpc::Status::OK;
     }
 
     // return generated ids
-    auto pair = chunk_data.find(engine::FIELD_UID);
-    if (pair != chunk_data.end()) {
-        response->mutable_entity_id_array()->Resize(static_cast<int>(pair->second.size() / sizeof(int64_t)), 0);
-        memcpy(response->mutable_entity_id_array()->mutable_data(), pair->second.data(), pair->second.size());
+    if (!insert_param.id_returned_.empty()) {
+        response->mutable_entity_id_array()->Resize(static_cast<int>(insert_param.id_returned_.size()), 0);
+        memcpy(response->mutable_entity_id_array()->mutable_data(), insert_param.id_returned_.data(),
+               insert_param.id_returned_.size() * sizeof(int64_t));
     }
 
     LOG_SERVER_INFO_ << LogOut("Request [%s] %s end.", request_id.c_str(), __func__);
diff --git a/core/src/server/web_impl/handler/WebRequestHandler.cpp b/core/src/server/web_impl/handler/WebRequestHandler.cpp
index 37845b245b..c524735de0 100644
--- a/core/src/server/web_impl/handler/WebRequestHandler.cpp
+++ b/core/src/server/web_impl/handler/WebRequestHandler.cpp
@@ -83,55 +83,70 @@ WebErrorMap(ErrorCode code) {
     }
 }
 
-template <typename T>
-void
-CopyStructuredData(const nlohmann::json& json, std::vector<uint8_t>& raw) {
-    std::vector<T> values;
-    auto size = json.size();
-    values.resize(size);
-    raw.resize(size * sizeof(T));
-    size_t offset = 0;
-    for (const auto& data : json) {
-        values[offset] = data.get<T>();
-        ++offset;
-    }
-    memcpy(raw.data(), values.data(), size * sizeof(T));
-}
+using ChunkDataMap = std::unordered_map<std::string, std::vector<uint8_t>>;
 
 void
-CopyRowVectorFromJson(const nlohmann::json& json, std::vector<uint8_t>& vectors_data, bool bin) {
-    //    if (!json.is_array()) {
-    //        return Status(ILLEGAL_BODY, "field \"vectors\" must be a array");
-    //    }
+CopyRowVectorFromJson(const nlohmann::json& json, const std::string& field_name, int64_t offset, int64_t row_num,
+                      bool is_binary, ChunkDataMap& chunk_data) {
+    std::vector<uint8_t> binary_data;
     std::vector<float> float_vector;
-    if (!bin) {
+    uint64_t bytes = 0;
+    if (is_binary) {
+        for (auto& data : json) {
+            binary_data.emplace_back(data.get<uint8_t>());
+        }
+        bytes = binary_data.size() * sizeof(uint8_t);
+    } else {
         for (auto& data : json) {
             float_vector.emplace_back(data.get<float>());
         }
-        auto size = float_vector.size() * sizeof(float);
-        vectors_data.resize(size);
-        memcpy(vectors_data.data(), float_vector.data(), size);
+        bytes = float_vector.size() * sizeof(float);
+    }
+
+    if (chunk_data.find(field_name) == chunk_data.end()) {
+        std::vector<uint8_t> data(row_num * bytes, 0);
+        chunk_data.insert({field_name, data});
+    }
+
+    int64_t vector_offset = offset * bytes;
+    std::vector<uint8_t>& target_data = chunk_data.at(field_name);
+    if (is_binary) {
+        memcpy(target_data.data() + vector_offset, binary_data.data(), bytes);
     } else {
-        for (auto& data : json) {
-            vectors_data.emplace_back(data.get<uint8_t>());
-        }
+        memcpy(target_data.data() + vector_offset, float_vector.data(), bytes);
     }
 }
 
 template <typename T>
 void
-CopyRowStructuredData(const nlohmann::json& entity_json, const std::string& field_name, const int64_t offset,
-                      const int64_t row_num, std::unordered_map<std::string, std::vector<uint8_t>>& chunk_data) {
+CopyRowStructuredData(const nlohmann::json& entity_json, const std::string& field_name, int64_t offset, int64_t row_num,
+                      ChunkDataMap& chunk_data) {
     T value = entity_json.get<T>();
-    std::vector<uint8_t> temp_data(sizeof(T), 0);
-    memcpy(temp_data.data(), &value, sizeof(T));
     if (chunk_data.find(field_name) == chunk_data.end()) {
         std::vector<uint8_t> T_data(row_num * sizeof(T), 0);
-        memcpy(T_data.data(), temp_data.data(), sizeof(T));
+        memcpy(T_data.data(), &value, sizeof(T));
         chunk_data.insert({field_name, T_data});
     } else {
         int64_t T_offset = offset * sizeof(T);
-        memcpy(chunk_data.at(field_name).data() + T_offset, temp_data.data(), sizeof(T));
+        memcpy(chunk_data.at(field_name).data() + T_offset, &value, sizeof(T));
+    }
+}
+
+template <typename T>
+void
+RecordDataAddr(const std::string& field_name, int32_t num, const T* data, InsertParam& insert_param) {
+    int64_t bytes = num * sizeof(T);
+    const char* data_addr = reinterpret_cast<const char*>(data);
+    auto data_segment = std::make_pair(data_addr, bytes);
+    insert_param.fields_data_[field_name].emplace_back(data_segment);
+}
+
+void
+ConvertToParam(const ChunkDataMap& data_chunk, int64_t row_num, InsertParam& insert_param) {
+    insert_param.row_count_ = row_num;
+    for (auto& pair : data_chunk) {
+        auto& bin = pair.second;
+        RecordDataAddr<uint8_t>(pair.first, bin.size(), bin.data(), insert_param);
     }
 }
 
@@ -1623,29 +1638,24 @@ WebRequestHandler::InsertEntity(const OString& collection_name, const milvus::se
         field_types.insert({field.first, field.second.field_type_});
     }
 
-    std::unordered_map<std::string, std::vector<uint8_t>> chunk_data;
-    int64_t row_num;
-
     auto entities_json = body_json["entities"];
     if (!entities_json.is_array()) {
         RETURN_STATUS_DTO(ILLEGAL_ARGUMENT, "Entities is not an array");
     }
-    row_num = entities_json.size();
+
+    // construct chunk data by json object
+    ChunkDataMap chunk_data;
+    int64_t row_num = entities_json.size();
     int64_t offset = 0;
-    std::vector<uint8_t> ids;
     for (auto& one_entity : entities_json) {
         for (auto& entity : one_entity.items()) {
             std::string field_name = entity.key();
             if (field_name == NAME_ID) {
-                if (ids.empty()) {
-                    ids.resize(row_num * sizeof(int64_t));
-                }
-                auto id = entity.value().get<int64_t>();
-                int64_t id_offset = offset * sizeof(int64_t);
-                memcpy(ids.data() + id_offset, &id, sizeof(int64_t));
+                // special handle id field
+                CopyRowStructuredData<int64_t>(entity.value(), engine::FIELD_UID, offset, row_num, chunk_data);
                 continue;
             }
-            std::vector<uint8_t> temp_data;
+
             switch (field_types.at(field_name)) {
                 case engine::DataType::INT32: {
                     CopyRowStructuredData<int32_t>(entity.value(), field_name, offset, row_num, chunk_data);
@@ -1666,16 +1676,7 @@ WebRequestHandler::InsertEntity(const OString& collection_name, const milvus::se
                 case engine::DataType::VECTOR_FLOAT:
                 case engine::DataType::VECTOR_BINARY: {
                     bool is_bin = !(field_types.at(field_name) == engine::DataType::VECTOR_FLOAT);
-                    CopyRowVectorFromJson(entity.value(), temp_data, is_bin);
-                    auto size = temp_data.size();
-                    if (chunk_data.find(field_name) == chunk_data.end()) {
-                        std::vector<uint8_t> vector_data(row_num * size, 0);
-                        memcpy(vector_data.data(), temp_data.data(), size);
-                        chunk_data.insert({field_name, vector_data});
-                    } else {
-                        int64_t vector_offset = offset * size;
-                        memcpy(chunk_data.at(field_name).data() + vector_offset, temp_data.data(), size);
-                    }
+                    CopyRowVectorFromJson(entity.value(), field_name, offset, row_num, is_bin, chunk_data);
                     break;
                 }
                 default: {}
@@ -1684,71 +1685,21 @@ WebRequestHandler::InsertEntity(const OString& collection_name, const milvus::se
         offset++;
     }
 
-    if (!ids.empty()) {
-        chunk_data.insert({engine::FIELD_UID, ids});
-    }
+    // conver to InsertParam, no memory copy, just record the data address and pass to InsertReq
+    InsertParam insert_param;
+    ConvertToParam(chunk_data, row_num, insert_param);
 
-#if 0
-    for (auto& entity : body_json["entities"].items()) {
-        std::string field_name = entity.key();
-        auto field_value = entity.value();
-        if (!field_value.is_array()) {
-            RETURN_STATUS_DTO(ILLEGAL_ROWRECORD, "Field value is not an array");
-        }
-        if (field_name == NAME_ID) {
-            std::vector<uint8_t> temp_data(field_value.size() * sizeof(int64_t), 0);
-            CopyStructuredData<int64_t>(field_value, temp_data);
-            chunk_data.insert({engine::FIELD_UID, temp_data});
-            continue;
-        }
-        row_num = field_value.size();
-
-        std::vector<uint8_t> temp_data;
-        switch (field_types.at(field_name)) {
-            case engine::DataType::INT32: {
-                CopyStructuredData<int32_t>(field_value, temp_data);
-                break;
-            }
-            case engine::DataType::INT64: {
-                CopyStructuredData<int64_t>(field_value, temp_data);
-                break;
-            }
-            case engine::DataType::FLOAT: {
-                CopyStructuredData<float>(field_value, temp_data);
-                break;
-            }
-            case engine::DataType::DOUBLE: {
-                CopyStructuredData<double>(field_value, temp_data);
-                break;
-            }
-            case engine::DataType::VECTOR_FLOAT: {
-                CopyRecordsFromJson(field_value, temp_data, false);
-                break;
-            }
-            case engine::DataType::VECTOR_BINARY: {
-                CopyRecordsFromJson(field_value, temp_data, true);
-                break;
-            }
-            default: {}
-        }
-
-        chunk_data.insert(std::make_pair(field_name, temp_data));
-    }
-#endif
-
-    status = req_handler_.Insert(context_ptr_, collection_name->c_str(), partition_name, row_num, chunk_data);
+    // do insert
+    status = req_handler_.Insert(context_ptr_, collection_name->c_str(), partition_name, insert_param);
     if (!status.ok()) {
         RETURN_STATUS_DTO(UNEXPECTED_ERROR, "Failed to insert data");
     }
 
     // return generated ids
-    auto pair = chunk_data.find(engine::FIELD_UID);
-    if (pair != chunk_data.end()) {
-        int64_t count = pair->second.size() / 8;
-        auto pdata = reinterpret_cast<int64_t*>(pair->second.data());
+    if (!insert_param.id_returned_.empty()) {
         ids_dto->ids = ids_dto->ids.createShared();
-        for (int64_t i = 0; i < count; ++i) {
-            ids_dto->ids->push_back(std::to_string(pdata[i]).c_str());
+        for (auto id : insert_param.id_returned_) {
+            ids_dto->ids->push_back(std::to_string(id).c_str());
         }
     }
     ids_dto->code = status.code();