Merge branch '0.5.1' into '0.5.1'

0.5.1

See merge request megasearch/milvus!814

Former-commit-id: 0e8c62a802edb2546d1f69bbb23df992c37bae67

CHANGELOG.md

@@ -7,6 +7,7 @@ Please mark all change in change log and use the ticket from JIRA.
 ## Bug
 - \#134 - JFrog cache error
 - \#161 - Search IVFSQHybrid crash on gpu
+- \#169 - IVF_FLAT search out of memory
 
 ## Feature
 - \#90 - The server start error messages could be improved to enhance user experience

core/src/db/engine/ExecutionEngineImpl.cpp

@@ -309,30 +309,13 @@ ExecutionEngineImpl::CopyToGpu(uint64_t device_id, bool hybrid) {
         return Status::OK();
     }
 #endif
-
-    auto index = std::static_pointer_cast<VecIndex>(cache::GpuCacheMgr::GetInstance(device_id)->GetIndex(location_));
-    bool already_in_cache = (index != nullptr);
-    if (already_in_cache) {
-        index_ = index;
-    } else {
-        if (index_ == nullptr) {
-            ENGINE_LOG_ERROR << "ExecutionEngineImpl: index is null, failed to copy to gpu";
-            return Status(DB_ERROR, "index is null");
-        }
-
-        try {
-            index_ = index_->CopyToGpu(device_id);
-            ENGINE_LOG_DEBUG << "CPU to GPU" << device_id;
-        } catch (std::exception& e) {
-            ENGINE_LOG_ERROR << e.what();
-            return Status(DB_ERROR, e.what());
-        }
+    try {
+        index_ = index_->CopyToGpu(device_id);
+        ENGINE_LOG_DEBUG << "CPU to GPU" << device_id;
+    } catch (std::exception& e) {
+        ENGINE_LOG_ERROR << e.what();
+        return Status(DB_ERROR, e.what());
     }
-
-    if (!already_in_cache) {
-        GpuCache(device_id);
-    }
-
     return Status::OK();
 }