diff --git a/ci/jenkinsfile/dev_test.groovy b/ci/jenkinsfile/dev_test.groovy
index f9df9b4065..9b265ac401 100644
--- a/ci/jenkinsfile/dev_test.groovy
+++ b/ci/jenkinsfile/dev_test.groovy
@@ -3,7 +3,7 @@ timeout(time: 30, unit: 'MINUTES') {
         dir ("${PROJECT_NAME}_test") {
             checkout([$class: 'GitSCM', branches: [[name: "${SEMVER}"]], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: "${params.GIT_USER}", url: "git@192.168.1.105:Test/milvus_test.git", name: 'origin', refspec: "+refs/heads/${SEMVER}:refs/remotes/origin/${SEMVER}"]]])
             sh 'python3 -m pip install -r requirements.txt -i http://pypi.douban.com/simple --trusted-host pypi.douban.com'
-            sh "pytest . --alluredir=\"test_out/dev/single/sqlite\" --level=1 --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-1.svc.cluster.local"
+            sh "pytest . --alluredir=\"test_out/dev/single/sqlite\" --level=1 --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-1.svc.cluster.local --internal=true"
         }
         // mysql database backend test
         load "${env.WORKSPACE}/ci/jenkinsfile/cleanup_dev.groovy"
@@ -19,7 +19,7 @@ timeout(time: 30, unit: 'MINUTES') {
             }
         }
         dir ("${PROJECT_NAME}_test") {
-            sh "pytest . --alluredir=\"test_out/dev/single/mysql\" --level=1 --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-2.svc.cluster.local"
+            sh "pytest . --alluredir=\"test_out/dev/single/mysql\" --level=1 --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-2.svc.cluster.local --internal=true"
         }
     } catch (exc) {
         echo 'Milvus Test Failed !'
diff --git a/ci/jenkinsfile/dev_test_all.groovy b/ci/jenkinsfile/dev_test_all.groovy
index b11ea755b9..b82d995d8c 100644
--- a/ci/jenkinsfile/dev_test_all.groovy
+++ b/ci/jenkinsfile/dev_test_all.groovy
@@ -3,7 +3,7 @@ timeout(time: 60, unit: 'MINUTES') {
         dir ("${PROJECT_NAME}_test") {
             checkout([$class: 'GitSCM', branches: [[name: "${SEMVER}"]], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: "${params.GIT_USER}", url: "git@192.168.1.105:Test/milvus_test.git", name: 'origin', refspec: "+refs/heads/${SEMVER}:refs/remotes/origin/${SEMVER}"]]])
             sh 'python3 -m pip install -r requirements.txt -i http://pypi.douban.com/simple --trusted-host pypi.douban.com'
-            sh "pytest . --alluredir=\"test_out/dev/single/sqlite\" --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-1.svc.cluster.local"
+            sh "pytest . --alluredir=\"test_out/dev/single/sqlite\" --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-1.svc.cluster.local --internal=true"
         }
 
         // mysql database backend test
@@ -20,7 +20,7 @@ timeout(time: 60, unit: 'MINUTES') {
             }
         }
         dir ("${PROJECT_NAME}_test") {
-            sh "pytest . --alluredir=\"test_out/dev/single/mysql\" --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-2.svc.cluster.local"
+            sh "pytest . --alluredir=\"test_out/dev/single/mysql\" --ip ${env.JOB_NAME}-${env.BUILD_NUMBER}-milvus-gpu-engine.milvus-2.svc.cluster.local --internal=true"
         }
     } catch (exc) {
         echo 'Milvus Test Failed !'
diff --git a/core/src/index/knowhere/knowhere/index/vector_index/IndexIVF.cpp b/core/src/index/knowhere/knowhere/index/vector_index/IndexIVF.cpp
index 201071c0a4..6da5db38ec 100644
--- a/core/src/index/knowhere/knowhere/index/vector_index/IndexIVF.cpp
+++ b/core/src/index/knowhere/knowhere/index/vector_index/IndexIVF.cpp
@@ -221,9 +221,10 @@ IVF::search_impl(int64_t n, const float* data, int64_t k, float* distances, int6
     faiss::ivflib::search_with_parameters(index_.get(), n, (float*)data, k, distances, labels, params.get());
     stdclock::time_point after = stdclock::now();
     double search_cost = (std::chrono::duration<double, std::micro>(after - before)).count();
-    KNOWHERE_LOG_DEBUG << "IVF search cost: " << search_cost
-                       << ", quantization cost: " << faiss::indexIVF_stats.quantization_time
-                       << ", data search cost: " << faiss::indexIVF_stats.search_time;
+    KNOWHERE_LOG_DEBUG << "K=" << k << " NQ=" << n << " NL=" << faiss::indexIVF_stats.nlist
+                       << " ND=" << faiss::indexIVF_stats.ndis << " NH=" << faiss::indexIVF_stats.nheap_updates
+                       << " Q=" << faiss::indexIVF_stats.quantization_time
+                       << " S=" << faiss::indexIVF_stats.search_time;
     faiss::indexIVF_stats.quantization_time = 0;
     faiss::indexIVF_stats.search_time = 0;
 }
diff --git a/core/src/scheduler/job/SearchJob.h b/core/src/scheduler/job/SearchJob.h
index 1e586090b9..90fcf36773 100644
--- a/core/src/scheduler/job/SearchJob.h
+++ b/core/src/scheduler/job/SearchJob.h
@@ -90,6 +90,11 @@ class SearchJob : public Job {
         return index_files_;
     }
 
+    std::mutex&
+    mutex() {
+        return mutex_;
+    }
+
  private:
     uint64_t topk_ = 0;
     uint64_t nq_ = 0;
diff --git a/core/src/scheduler/task/SearchTask.cpp b/core/src/scheduler/task/SearchTask.cpp
index 1bf1caff76..edeb41bdbe 100644
--- a/core/src/scheduler/task/SearchTask.cpp
+++ b/core/src/scheduler/task/SearchTask.cpp
@@ -219,8 +219,11 @@ XSearchTask::Execute() {
 
             // step 3: pick up topk result
             auto spec_k = index_engine_->Count() < topk ? index_engine_->Count() : topk;
-            XSearchTask::MergeTopkToResultSet(output_ids, output_distance, spec_k, nq, topk, metric_l2,
-                                              search_job->GetResult());
+            {
+                std::unique_lock<std::mutex> lock(search_job->mutex());
+                XSearchTask::MergeTopkToResultSet(output_ids, output_distance, spec_k, nq, topk, metric_l2,
+                                                  search_job->GetResult());
+            }
 
             span = rc.RecordSection(hdr + ", reduce topk");
             //            search_job->AccumReduceCost(span);