diff --git a/cmd/tools/cli/benchmark/core/main.go b/cmd/tools/cli/benchmark/core/main.go
index 9a97418b2e..b715aa738d 100644
--- a/cmd/tools/cli/benchmark/core/main.go
+++ b/cmd/tools/cli/benchmark/core/main.go
@@ -288,7 +288,7 @@ func main() {
 	})
 
 	ids := make([]uint, len(vectors))
-	run(ctx, false, path, len(vectors[0]), vectors, ids, time.Hour*2, output)
+	run(ctx, false, path, len(vectors[0]), vectors, ids, time.Hour*1, output)
 	sleep(ctx, time.Second*5, time.Minute*4, func() {
 		output("waiting for next")
 	}, func() {
@@ -298,15 +298,15 @@ func main() {
 		output("starting")
 	})
 	run(ctx, true, path, len(vectors[0]), nil, nil, 0, output)
-	sleep(ctx, time.Second*5, time.Minute*4, func() {
-		output("waiting for next")
-	}, func() {
-		runtime.GC()
-		output("gc")
-		time.Sleep(time.Minute)
-		output("starting")
-	})
-	run(ctx, true, path, len(vectors[0]), vectors, ids, time.Hour*2, output)
+	// sleep(ctx, time.Second*5, time.Minute*4, func() {
+	// 	output("waiting for next")
+	// }, func() {
+	// 	runtime.GC()
+	// 	output("gc")
+	// 	time.Sleep(time.Minute)
+	// 	output("starting")
+	// })
+	// run(ctx, true, path, len(vectors[0]), vectors, ids, time.Hour*2, output)
 
 	ids = ids[:0:0]
 	ids = nil
diff --git a/internal/core/algorithm/ngt/ngt.go b/internal/core/algorithm/ngt/ngt.go
index 557bbb49a7..4d4d227c18 100644
--- a/internal/core/algorithm/ngt/ngt.go
+++ b/internal/core/algorithm/ngt/ngt.go
@@ -517,18 +517,16 @@ func (n *ngt) Insert(vec []float32) (id uint, err error) {
 	}
 	dim := C.uint32_t(n.dimension)
 	cvec := (*C.float)(&vec[0])
-	ebuf := n.GetErrorBuffer()
 	n.lock(true)
-	oid := C.ngt_insert_index_as_float(n.index, cvec, dim, ebuf)
+	oid := C.ngt_insert_index_as_float(nil, cvec, dim, nil)
 	n.unlock(true)
 	id = uint(oid)
 	cvec = nil
 	vec = vec[:0:0]
 	vec = nil
 	if id == 0 {
-		return 0, n.newGoError(ebuf)
+		return 0, errors.Errorf("Insert Error")
 	}
-	n.PutErrorBuffer(ebuf)
 	n.cnt.Add(1)
 
 	return id, nil
@@ -622,14 +620,12 @@ func (n *ngt) CreateIndex(poolSize uint32) error {
 	if poolSize == 0 {
 		poolSize = n.poolSize
 	}
-	ebuf := n.GetErrorBuffer()
 	n.lock(true)
-	ret := C.ngt_create_index(n.index, C.uint32_t(poolSize), ebuf)
+	ret := C.ngt_create_index(nil, C.uint32_t(poolSize), nil)
 	n.unlock(true)
 	if ret == ErrorCode {
-		return n.newGoError(ebuf)
+		return errors.Errorf("CreateIndex Error")
 	}
-	n.PutErrorBuffer(ebuf)
 
 	return nil
 }
@@ -672,14 +668,12 @@ func (n *ngt) SaveIndexWithPath(idxPath string) error {
 
 // Remove removes from NGT index.
 func (n *ngt) Remove(id uint) error {
-	ebuf := n.GetErrorBuffer()
 	n.lock(true)
-	ret := C.ngt_remove_index(n.index, C.ObjectID(id), ebuf)
+	ret := C.ngt_remove_index(nil, C.ObjectID(id), nil)
 	n.unlock(true)
 	if ret == ErrorCode {
-		return n.newGoError(ebuf)
+		return errors.Errorf("Remove Error")
 	}
-	n.PutErrorBuffer(ebuf)
 
 	n.cnt.Add(^uint64(0))