gavinchou commented on code in PR #51708:
URL: https://github.com/apache/doris/pull/51708#discussion_r2148982041


##########
cloud/src/common/bvars.cpp:
##########
@@ -186,4 +188,180 @@ BvarStatusWithTag<int64_t> 
g_bvar_inverted_checker_abnormal_delete_bitmaps("chec
 BvarStatusWithTag<int64_t> 
g_bvar_inverted_checker_delete_bitmaps_scanned("checker", 
"delete_bitmap_keys_scanned");
 BvarStatusWithTag<int64_t> 
g_bvar_max_rowsets_with_useless_delete_bitmap_version("checker", 
"max_rowsets_with_useless_delete_bitmap_version");
 
+// rpc kv rw count

Review Comment:
   seems lack of instance level stats
   we may need to add `instance_id` a mbvar label.



##########
cloud/src/meta-service/meta_service_helper.h:
##########
@@ -232,16 +233,23 @@ inline MetaServiceCode cast_as(TxnErrorCode code) {
     brpc::ClosureGuard closure_guard(done);                                    
          \
     [[maybe_unused]] std::stringstream ss;                                     
          \
     [[maybe_unused]] MetaServiceCode code = MetaServiceCode::OK;               
          \
+    [[maybe_unused]] std::unique_ptr<Transaction> txn;                         
          \
     [[maybe_unused]] std::string msg;                                          
          \
     [[maybe_unused]] std::string instance_id;                                  
          \
     [[maybe_unused]] bool drop_request = false;                                
          \
+    [[maybe_unused]] KVStats stats(g_bvar_rpc_kv_##func_name##_read_counter,   
          \
+                                   g_bvar_rpc_kv_##func_name##_write_counter); 
          \
     std::unique_ptr<int, std::function<void(int*)>> defer_status((int*)0x01, 
[&](int*) { \
         response->mutable_status()->set_code(code);                            
          \
         response->mutable_status()->set_msg(msg);                              
          \
         finish_rpc(#func_name, ctrl, response);                                
          \
         closure_guard.reset(nullptr);                                          
          \
         if (config::use_detailed_metrics && !instance_id.empty() && 
!drop_request) {     \

Review Comment:
   does dropped request has any attached metrics?
   if no, we should add one



##########
cloud/src/meta-service/mem_txn_kv.h:
##########
@@ -29,6 +30,7 @@
 #include <unordered_map>
 #include <vector>
 
+#include "common/stats.h"

Review Comment:
   what is this for?



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