diff --git a/internal/caches/memory_fragment_pool.go b/internal/caches/memory_fragment_pool.go
index a9928a2..2ab2c67 100644
--- a/internal/caches/memory_fragment_pool.go
+++ b/internal/caches/memory_fragment_pool.go
@@ -22,13 +22,15 @@ const (
 	maxMemoryFragmentPoolItemAgeSeconds = 60
 )
 
-var SharedFragmentMemoryPool = NewMemoryFragmentPool()
+var SharedFragmentMemoryPool *MemoryFragmentPool
 
 func init() {
 	if !teaconst.IsMain {
 		return
 	}
 
+	SharedFragmentMemoryPool = NewMemoryFragmentPool()
+
 	goman.New(func() {
 		var ticker = time.NewTicker(200 * time.Millisecond)
 		for range ticker.C {