diff --git a/internal/caches/storage_memory.go b/internal/caches/storage_memory.go
index d56ee61..a102335 100644
--- a/internal/caches/storage_memory.go
+++ b/internal/caches/storage_memory.go
@@ -99,10 +99,19 @@ func (this *MemoryStorage) Init() error {
 
 	// 启动定时Flush memory to disk任务
 	if this.parentStorage != nil {
-		// TODO 应该根据磁盘性能决定线程数
-		// TODO 线程数应该可以在缓存策略和节点中设定
-		var threads = runtime.NumCPU()
-
+		var threads = 2
+		var numCPU = runtime.NumCPU()
+		if fsutils.DiskIsExtremelyFast() {
+			if numCPU >= 8 {
+				threads = 8
+			} else {
+				threads = 4
+			}
+		} else if fsutils.DiskIsFast() {
+			if numCPU >= 4 {
+				threads = 4
+			}
+		}
 		for i := 0; i < threads; i++ {
 			goman.New(func() {
 				this.startFlush()