diff --git a/cpp/CHANGELOG.md b/cpp/CHANGELOG.md
index 9ac6cb11bce700db4e4b8f5be796e2a2f4702832..3be585c7b6f2dc641677e85b6c4b77dae7ceec5c 100644
--- a/cpp/CHANGELOG.md
+++ b/cpp/CHANGELOG.md
@@ -9,8 +9,9 @@ Please mark all change in change log and use the ticket from JIRA.
 
 - MS-148 - Disable cleanup if mode is read only
 - MS-149 - Fixed searching only one index file issue in distributed mode
-- MS-153 - fix c_str error when connecting to MySQL
-- MS-157 - fix changelog
+- MS-153 - Fix c_str error when connecting to MySQL
+- MS-157 - Fix changelog
+- MS-217 - Fix SQ8 row count bug
 
 ## Improvement
 - MS-156 - Add unittest for merge result functions
diff --git a/cpp/conf/server_config.template b/cpp/conf/server_config.template
index 3f3b004456b56513e46bc4633aae7bc41a71e6a6..6de96ae89585a49fece1dce12f4286367a0a5030 100644
--- a/cpp/conf/server_config.template
+++ b/cpp/conf/server_config.template
@@ -14,8 +14,8 @@ db_config:
   db_backend_url: sqlite://:@:/
 
   index_building_threshold: 1024   # index building trigger threshold, default: 1024, unit: MB
-  archive_disk_threshold: 512      # triger archive action if storage size exceed this value, unit: GB
-  archive_days_threshold: 30       # files older than x days will be archived, unit: day
+  archive_disk_threshold: 0        # triger archive action if storage size exceed this value, 0 means no limit, unit: GB
+  archive_days_threshold: 0        # files older than x days will be archived, 0 means no limit, unit: day
 
 metric_config:
   is_startup: off      # if monitoring start: on, off
@@ -37,4 +37,4 @@ engine_config:
   nprobe: 10
   nlist: 16384
   use_blas_threshold: 20
-  metric_type: L2       #L2 or Inner Product
\ No newline at end of file
+  metric_type: L2       # compare vectors by euclidean distance(L2) or inner product(IP), optional: L2 or IP
\ No newline at end of file
diff --git a/cpp/src/db/DBImpl.cpp b/cpp/src/db/DBImpl.cpp
index 35a6f075f8ec726a68aef43155cdea23090f978d..beae6c30d31cdbaa6414f00f0934a76adcf1dc4c 100644
--- a/cpp/src/db/DBImpl.cpp
+++ b/cpp/src/db/DBImpl.cpp
@@ -487,7 +487,7 @@ Status DBImpl::BuildIndex(const meta::TableFileSchema& file) {
 
         //step 6: update meta
         table_file.file_type_ = meta::TableFileSchema::INDEX;
-        table_file.size_ = index->PhysicalSize();
+        table_file.size_ = index->Size();
 
         auto to_remove = file;
         to_remove.file_type_ = meta::TableFileSchema::TO_DELETE;
diff --git a/cpp/src/db/DBMetaImpl.cpp b/cpp/src/db/DBMetaImpl.cpp
index fc67c6b36029248f9a279ec8fcf97a85bde745a9..99ae3b6711a7aa8edfdcac8dfb0657f829d83d7c 100644
--- a/cpp/src/db/DBMetaImpl.cpp
+++ b/cpp/src/db/DBMetaImpl.cpp
@@ -674,16 +674,22 @@ Status DBMetaImpl::Archive() {
 Status DBMetaImpl::Size(uint64_t &result) {
     result = 0;
     try {
-        auto selected = ConnectorPtr->select(columns(sum(&TableFileSchema::size_)),
-                                             where(
-                                                 c(&TableFileSchema::file_type_) != (int) TableFileSchema::TO_DELETE
-                                             ));
+        auto files = ConnectorPtr->select(columns(&TableFileSchema::size_,
+                                                  &TableFileSchema::file_type_,
+                                                  &TableFileSchema::engine_type_),
+                                          where(
+                                                  c(&TableFileSchema::file_type_) != (int) TableFileSchema::TO_DELETE
+                                          ));
 
-        for (auto &sub_query : selected) {
-            if (!std::get<0>(sub_query)) {
-                continue;
+        for (auto &file : files) {
+            auto file_size = std::get<0>(file);
+            auto file_type = std::get<1>(file);
+            auto engine_type = std::get<2>(file);
+            if(file_type == (int)TableFileSchema::INDEX && engine_type == (int)EngineType::FAISS_IVFSQ8) {
+                result += (uint64_t)file_size/4;//hardcode for sq8
+            } else {
+                result += (uint64_t)file_size;
             }
-            result += (uint64_t) (*std::get<0>(sub_query));
         }
     } catch (std::exception &e) {
         return HandleException("Encounter exception when calculte db size", e);
diff --git a/cpp/src/db/FaissExecutionEngine.cpp b/cpp/src/db/FaissExecutionEngine.cpp
index d2cb835364291b3ba62dfc1002d6978c8f684e5e..7183f430171c07b47a2062d77dd214b8c8e22375 100644
--- a/cpp/src/db/FaissExecutionEngine.cpp
+++ b/cpp/src/db/FaissExecutionEngine.cpp
@@ -110,7 +110,7 @@ Status FaissExecutionEngine::Merge(const std::string& location) {
     if (location == location_) {
         return Status::Error("Cannot Merge Self");
     }
-    ENGINE_LOG_DEBUG << "Merge index file: " << location << " to: " << location_;
+    ENGINE_LOG_DEBUG << "Merge raw file: " << location << " to: " << location_;
 
     auto to_merge = zilliz::milvus::cache::CpuCacheMgr::GetInstance()->GetIndex(location);
     if (!to_merge) {
diff --git a/cpp/src/db/Options.h b/cpp/src/db/Options.h
index 1c3c28b4ac6ff2fa653a0b53b5d1aad6ae406bbf..f6c09fb75041db9f286b2fefb25fd369fbad459b 100644
--- a/cpp/src/db/Options.h
+++ b/cpp/src/db/Options.h
@@ -22,7 +22,7 @@ static constexpr uint64_t ONE_GB = ONE_KB*ONE_MB;
 
 static const std::string ARCHIVE_CONF_DISK = "disk";
 static const std::string ARCHIVE_CONF_DAYS = "days";
-static const std::string ARCHIVE_CONF_DEFAULT = ARCHIVE_CONF_DISK + ":512";
+static const std::string ARCHIVE_CONF_DEFAULT = "";
 
 struct ArchiveConf {
     using CriteriaT = std::map<std::string, int>;