enh: code optimization for insert_req statistics

source/dnode/vnode/src/vnd/vnodeSvr.c

@@ -819,11 +819,12 @@ static int32_t vnodeProcessSubmitReq(SVnode *pVnode, int64_t version, void *pReq
   int32_t        tsize, ret;
   SEncoder       encoder = {0};
   SArray        *newTbUids = NULL;
+  SVStatis       statis = {0};
   terrno = TSDB_CODE_SUCCESS;
 
   pRsp->code = 0;
   pSubmitReq->version = version;
-  atomic_fetch_add_64(&pVnode->statis.nBatchInsert, 1);
+  statis.nBatchInsert = 1;
 
 #ifdef TD_DEBUG_PRINT_ROW
   vnodeDebugPrintSubmitMsg(pVnode, pReq, __func__);
@@ -943,18 +944,21 @@ _exit:
 
   taosArrayDestroyEx(submitRsp.pArray, tFreeSSubmitBlkRsp);
 
-  atomic_fetch_add_64(&pVnode->statis.nInsert, submitRsp.numOfRows);
-  atomic_fetch_add_64(&pVnode->statis.nInsertSuccess, submitRsp.affectedRows);
-
   // TODO: the partial success scenario and the error case
   // => If partial success, extract the success submitted rows and reconstruct a new submit msg, and push to level
   // 1/level 2.
   // TODO: refactor
   if ((terrno == TSDB_CODE_SUCCESS) && (pRsp->code == TSDB_CODE_SUCCESS)) {
-    atomic_fetch_add_64(&pVnode->statis.nBatchInsertSuccess, 1);
+    statis.nBatchInsertSuccess = 1;
     tdProcessRSmaSubmit(pVnode->pSma, pReq, STREAM_INPUT__DATA_SUBMIT);
   }
 
+  // N.B not strict as the following update steps is not atomic
+  atomic_add_fetch_64(&pVnode->statis.nInsert, submitRsp.numOfRows);
+  atomic_add_fetch_64(&pVnode->statis.nInsertSuccess, submitRsp.affectedRows);
+  atomic_add_fetch_64(&pVnode->statis.nBatchInsertSuccess, statis.nBatchInsertSuccess);
+  atomic_add_fetch_64(&pVnode->statis.nBatchInsert, statis.nBatchInsert);
+
   vDebug("vgId:%d, submit success, index:%" PRId64, pVnode->config.vgId, version);
   return 0;
 }