diff --git a/source/libs/sync/src/syncRaftLog.c b/source/libs/sync/src/syncRaftLog.c
index 2b1cee51d70840466ae60779f407b5aaf53df07c..955ecf9c296dc97335a7037fa0eedc4b73ed29f8 100644
--- a/source/libs/sync/src/syncRaftLog.c
+++ b/source/libs/sync/src/syncRaftLog.c
@@ -38,7 +38,7 @@ SSyncLogStore* logStoreCreate(SSyncNode* pSyncNode) {
   }
 
   // pLogStore->pCache = taosLRUCacheInit(10 * 1024 * 1024, 1, .5);
-  pLogStore->pCache = taosLRUCacheInit(100 * 1024 * 1024, 1, .5);
+  pLogStore->pCache = taosLRUCacheInit(30 * 1024 * 1024, 1, .5);
   if (pLogStore->pCache == NULL) {
     taosMemoryFree(pLogStore);
     terrno = TSDB_CODE_WAL_OUT_OF_MEMORY;
@@ -325,12 +325,15 @@ static int32_t raftLogTruncate(struct SSyncLogStore* pLogStore, SyncIndex fromIn
   // delete from cache
   for (SyncIndex index = fromIndex; index <= wallastVer; ++index) {
     SLRUCache* pCache = pData->pSyncNode->pLogStore->pCache;
+    taosLRUCacheErase(pData->pSyncNode->pLogStore->pCache, &index, sizeof(index));
+#if 0  
     LRUHandle* h = taosLRUCacheLookup(pCache, &index, sizeof(index));
     if (h) {
       sNTrace(pData->pSyncNode, "cache delete index:%" PRId64, index);
 
       taosLRUCacheRelease(pData->pSyncNode->pLogStore->pCache, h, true);
     }
+#endif
   }
 
   int32_t code = walRollback(pWal, fromIndex);