diff --git a/src/sync/src/syncRestore.c b/src/sync/src/syncRestore.c
index 589ff470f170f2ff94efe1974b1c755ea8e16bb1..4247468bcae77dab49f61dd684a80ada9701418c 100644
--- a/src/sync/src/syncRestore.c
+++ b/src/sync/src/syncRestore.c
@@ -36,6 +36,8 @@ static void syncRemoveExtraFile(SSyncPeer *pPeer, int32_t sindex, int32_t eindex
 
   if (sindex < 0 || eindex < sindex) return;
 
+  sDebug("%s, extra files will be removed between sindex:%d and eindex:%d", pPeer->id, sindex, eindex);
+
   while (1) {
     name[0] = 0;
     magic = (*pNode->getFileInfo)(pNode->vgId, name, &index, eindex, &size, &fversion);
@@ -61,11 +63,12 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
   bool       fileChanged = false;
 
   *fversion = 0;
-  sinfo.index = 0;
+  sinfo.index = -1;
   while (1) {
     // read file info
-    int32_t ret = taosReadMsg(pPeer->syncFd, &(minfo), sizeof(SFileInfo));
-    if (ret != sizeof(SFileInfo)) {
+    minfo.index = -1;
+    int32_t ret = taosReadMsg(pPeer->syncFd, &minfo, sizeof(SFileInfo));
+    if (ret != sizeof(SFileInfo) || minfo.index == -1) {
       sError("%s, failed to read file info while restore file since %s", pPeer->id, strerror(errno));
       break;
     }
@@ -75,7 +78,7 @@ static int32_t syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
       sDebug("%s, no more files to restore", pPeer->id);
 
       // remove extra files after the current index
-      syncRemoveExtraFile(pPeer, sinfo.index + 1, TAOS_SYNC_MAX_INDEX);
+      if (sinfo.index != -1) syncRemoveExtraFile(pPeer, sinfo.index + 1, TAOS_SYNC_MAX_INDEX);
       code = 0;
       break;
     }
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index 7cf1a9059839e2111808b9458b35fb1ad0573f57..80e2dc422e07395f19fa2cad79b37037e3d06f86 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -243,8 +243,10 @@ int32_t vnodeWriteToWQueue(void *vparam, void *wparam, int32_t qtype, void *rpar
 
   int32_t queued = atomic_add_fetch_32(&pVnode->queuedWMsg, 1);
   if (queued > MAX_QUEUED_MSG_NUM) {
-    vDebug("vgId:%d, too many msg:%d in vwqueue, flow control", pVnode->vgId, queued);
-    taosMsleep(3);
+    int32_t ms = (queued / MAX_QUEUED_MSG_NUM) * 10 + 3;
+    if (ms > 100) ms = 100;
+    vDebug("vgId:%d, too many msg:%d in vwqueue, flow control %dms", pVnode->vgId, queued, ms);
+    taosMsleep(ms);
   }
 
   code = vnodePerformFlowCtrl(pWrite);