diff --git a/weed/filesys/dirty_page.go b/weed/filesys/dirty_page.go
index 584db809d..04e05b440 100644
--- a/weed/filesys/dirty_page.go
+++ b/weed/filesys/dirty_page.go
@@ -29,21 +29,29 @@ func (pages *ContinuousDirtyPages) AddPage(ctx context.Context, offset int64, da
 	pages.Lock()
 	defer pages.Unlock()
 
-	isPerfectAppend := len(pages.pages) == 0
+	isPerfectOverwrite := false
+	isPerfectAppend := false
 	if len(pages.pages) > 0 {
 		lastPage := pages.pages[len(pages.pages)-1]
 		if lastPage.Offset+int64(len(lastPage.Data)) == offset {
 			// write continuous pages
-			glog.V(3).Infof("%s/%s append [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
+			glog.V(4).Infof("%s/%s append [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
 			isPerfectAppend = true
 		}
+		if pages.pages[0].Offset == offset && pages.totalSize() == int64(len(data)) {
+			glog.V(4).Infof("%s/%s overwrite [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
+			isPerfectOverwrite = true
+		}
+	} else {
+		glog.V(4).Infof("%s/%s append [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
+		isPerfectAppend = true
 	}
 
 	isPerfectReplace := false
 	for _, page := range pages.pages {
 		if page.Offset == offset && len(page.Data) == len(data) {
 			// perfect replace
-			glog.V(3).Infof("%s/%s replace [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
+			glog.V(4).Infof("%s/%s replace [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
 			page.Data = data
 			isPerfectReplace = true
 		}
@@ -53,23 +61,34 @@ func (pages *ContinuousDirtyPages) AddPage(ctx context.Context, offset int64, da
 		return nil, nil
 	}
 
-	if isPerfectAppend {
-		pages.pages = append(pages.pages, &DirtyPage{
-			Offset: offset,
-			Data:   data,
-		})
+	if isPerfectAppend || isPerfectOverwrite {
+		if isPerfectAppend {
+			glog.V(4).Infof("%s/%s append2 [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
+			pages.pages = append(pages.pages, &DirtyPage{
+				Offset: offset,
+				Data:   data,
+			})
+		}
+
+		if isPerfectOverwrite {
+			glog.V(4).Infof("%s/%s overwrite2 [%d,%d)", pages.f.dir.Path, pages.f.Name, offset, offset+int64(len(data)))
+			pages.pages = []*DirtyPage{&DirtyPage{
+				Offset: offset,
+				Data:   data,
+			}}
+		}
 
 		if pages.f.wfs.chunkSizeLimit > 0 && pages.totalSize() >= pages.f.wfs.chunkSizeLimit {
 			chunk, err = pages.saveToStorage(ctx)
 			pages.pages = nil
-			glog.V(3).Infof("%s/%s over size limit [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
+			glog.V(4).Infof("%s/%s over size limit [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
 		}
 		return
 	}
 
 	chunk, err = pages.saveToStorage(ctx)
 
-	glog.V(3).Infof("%s/%s saved [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
+	glog.V(4).Infof("%s/%s saved [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
 
 	pages.pages = []*DirtyPage{&DirtyPage{
 		Offset: offset,
@@ -87,7 +106,7 @@ func (pages *ContinuousDirtyPages) FlushToStorage(ctx context.Context) (chunk *f
 	if chunk, err = pages.saveToStorage(ctx); err == nil {
 		pages.pages = nil
 		if chunk != nil {
-			glog.V(3).Infof("%s/%s flush [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
+			glog.V(4).Infof("%s/%s flush [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
 		}
 	}
 	return
diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index 52df2824c..9fa971236 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -39,7 +39,7 @@ var _ = fs.HandleReleaser(&FileHandle{})
 
 func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
 
-	glog.V(3).Infof("%v/%v read fh: [%d,%d)", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(req.Size))
+	glog.V(4).Infof("%v/%v read fh: [%d,%d)", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(req.Size))
 
 	if len(fh.f.Chunks) == 0 {
 		glog.V(0).Infof("empty fh %v/%v", fh.f.dir.Path, fh.f.Name)
@@ -73,7 +73,7 @@ func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fus
 	})
 
 	if err != nil {
-		glog.V(3).Infof("%v/%v read fh lookup volume ids: %v", fh.f.dir.Path, fh.f.Name, err)
+		glog.V(4).Infof("%v/%v read fh lookup volume ids: %v", fh.f.dir.Path, fh.f.Name, err)
 		return fmt.Errorf("failed to lookup volume ids %v: %v", vids, err)
 	}
 
@@ -84,7 +84,7 @@ func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fus
 		go func(chunkView *filer2.ChunkView) {
 			defer wg.Done()
 
-			glog.V(3).Infof("read fh reading chunk: %+v", chunkView)
+			glog.V(4).Infof("read fh reading chunk: %+v", chunkView)
 
 			locations := vid2Locations[volumeId(chunkView.FileId)]
 			if locations == nil || len(locations.Locations) == 0 {
@@ -109,7 +109,7 @@ func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fus
 				return
 			}
 
-			glog.V(3).Infof("read fh read %d bytes: %+v", n, chunkView)
+			glog.V(4).Infof("read fh read %d bytes: %+v", n, chunkView)
 			totalRead += n
 
 		}(chunkView)
@@ -126,7 +126,7 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 
 	// write the request to volume servers
 
-	glog.V(3).Infof("%+v/%v write fh: [%d,%d)", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(len(req.Data)))
+	glog.V(4).Infof("%+v/%v write fh: [%d,%d)", fh.f.dir.Path, fh.f.Name, req.Offset, req.Offset+int64(len(req.Data)))
 
 	chunk, err := fh.dirtyPages.AddPage(ctx, req.Offset, req.Data)
 	if err != nil {
@@ -146,7 +146,7 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 
 func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
 
-	glog.V(3).Infof("%+v/%v release fh", fh.f.dir.Path, fh.f.Name)
+	glog.V(4).Infof("%+v/%v release fh", fh.f.dir.Path, fh.f.Name)
 
 	fh.f.isOpen = false
 
@@ -158,7 +158,7 @@ func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) err
 func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 	// fflush works at fh level
 	// send the data to the OS
-	glog.V(3).Infof("%s/%s fh flush %v", fh.f.dir.Path, fh.f.Name, req)
+	glog.V(4).Infof("%s/%s fh flush %v", fh.f.dir.Path, fh.f.Name, req)
 
 	chunk, err := fh.dirtyPages.FlushToStorage(ctx)
 	if err != nil {