diff --git a/source/libs/index/src/index_fst.c b/source/libs/index/src/index_fst.c
index cdd62c5f11..403b4a9122 100644
--- a/source/libs/index/src/index_fst.c
+++ b/source/libs/index/src/index_fst.c
@@ -304,9 +304,9 @@ void fstStateCompileForAnyTrans(FstCountingWriter *w, CompiledAddr addr, FstBuil
     for (size_t i = 0; i < sz; i++) {
       FstTransition *t = taosArrayGet(node->trans, i);
       index[t->inp] = i;
-      fstCountingWriterWrite(w, (char *)index, sizeof(index)); 
       //fstPackDeltaIn(w, addr, t->addr, tSize);
     }
+    fstCountingWriterWrite(w, (char *)index, 256); 
     free(index);
   }
   fstCountingWriterWrite(w, (char *)&packSizes, 1);
diff --git a/source/libs/index/test/indexTests.cpp b/source/libs/index/test/indexTests.cpp
index 82b5ca1e24..928c3875b0 100644
--- a/source/libs/index/test/indexTests.cpp
+++ b/source/libs/index/test/indexTests.cpp
@@ -168,9 +168,18 @@ void checkFstPerf() {
   int64_t s = taosGetTimestampUs();
   int num = Performance_fstWriteRecords(fw);
   int64_t e = taosGetTimestampUs();
-
   printf("write %d record cost %" PRId64"us\n", num,  e - s);
-  
+  delete fw;
+
+  FstReadMemory *m = new FstReadMemory(1024 * 64);
+  if (m->init()) {
+    uint64_t val;
+    if(m->Get("aaaaaaa", &val)) {
+      std::cout << "succes to Get val: " << val << std::endl;
+    } else {
+      std::cout << "failed to Get " << std::endl;
+    } 
+  }  
 }