diff --git a/libs/tm-db/rocksdb.go b/libs/tm-db/rocksdb.go
index 86fdc55262..996b9b7cc0 100644
--- a/libs/tm-db/rocksdb.go
+++ b/libs/tm-db/rocksdb.go
@@ -87,15 +87,13 @@ func NewRocksDB(name string, dir string) (*RocksDB, error) {
 		opts.SetMaxOpenFiles(maxOpenFiles)
 	}
 
-	opts.SetAllowMmapReads(true)
+	opts.SetAllowMmapReads(false)
 	if v, ok := params[mmapRead]; ok {
 		enable, err := strconv.ParseBool(v)
 		if err != nil {
 			panic(fmt.Sprintf("Invalid options parameter %s: %s", mmapRead, err))
 		}
-		if enable {
-			opts.SetAllowMmapReads(enable)
-		}
+		opts.SetAllowMmapReads(enable)
 	}
 
 	if v, ok := params[mmapWrite]; ok {