diff --git a/src/mnode/src/mnodeShow.c b/src/mnode/src/mnodeShow.c
index f66ef6b7a36ac785459b9093f54b8e33ba6cc622..f2caf30564439c0a93e6a333df08dab261cb6143 100644
--- a/src/mnode/src/mnodeShow.c
+++ b/src/mnode/src/mnodeShow.c
@@ -65,7 +65,7 @@ int32_t mnodeInitShow() {
   mnodeAddReadMsgHandle(TSDB_MSG_TYPE_CM_CONNECT, mnodeProcessConnectMsg);
   mnodeAddReadMsgHandle(TSDB_MSG_TYPE_CM_USE_DB, mnodeProcessUseMsg);
   
-  tsMnodeShowCache = taosCacheInit(TSDB_DATA_TYPE_BIGINT, 5, false, mnodeFreeShowObj, "show");
+  tsMnodeShowCache = taosCacheInit(TSDB_DATA_TYPE_BIGINT, 5, true, mnodeFreeShowObj, "show");
   return 0;
 }
 
@@ -389,10 +389,12 @@ static bool mnodeAccquireShowObj(SShowObj *pShow) {
 }
 
 static void* mnodePutShowObj(SShowObj *pShow) {
+  const int32_t DEFAULT_SHOWHANDLE_LIFE_SPAN = tsShellActivityTimer * 6 * 1000;
+
   if (tsMnodeShowCache != NULL) {
     pShow->index = atomic_add_fetch_32(&tsShowObjIndex, 1);
     uint64_t handleVal = (uint64_t)pShow;
-    SShowObj **ppShow = taosCachePut(tsMnodeShowCache, &handleVal, sizeof(int64_t), &pShow, sizeof(int64_t), 6000);
+    SShowObj **ppShow = taosCachePut(tsMnodeShowCache, &handleVal, sizeof(int64_t), &pShow, sizeof(int64_t), DEFAULT_SHOWHANDLE_LIFE_SPAN);
     pShow->ppShow = (void**)ppShow;
     mDebug("%p, show is put into cache, data:%p index:%d", pShow, ppShow, pShow->index);
     return pShow;
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index 337513940aad2dd6632c83b73dcd2f98441a9c62..49b9996cf4fcb813f3c0db00697277a5352e9116 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -279,7 +279,7 @@ void *taosCacheAcquireByKey(SCacheObj *pCacheObj, const void *key, size_t keyLen
     uDebug("cache:%s, key:%p, %p is retrieved from cache, refcnt:%d", pCacheObj->name, key, pData, T_REF_VAL_GET(ptNode));
   } else {
     atomic_add_fetch_32(&pCacheObj->statistics.missCount, 1);
-    uError("cache:%s, key:%p, not in cache, retrieved failed", pCacheObj->name, key);
+    uDebug("cache:%s, key:%p, not in cache, retrieved failed", pCacheObj->name, key);
   }
 
   atomic_add_fetch_32(&pCacheObj->statistics.totalAccess, 1);