diff --git a/include/dsn/perf_counter/perf_counters.h b/include/dsn/perf_counter/perf_counters.h
index 592633368f..61773fed28 100644
--- a/include/dsn/perf_counter/perf_counters.h
+++ b/include/dsn/perf_counter/perf_counters.h
@@ -146,6 +146,9 @@ class perf_counters : public dsn::utils::singleton<perf_counters>
         bool updated_recently{false};
     };
     std::unordered_map<std::string, counter_snapshot> _snapshots;
+
+    // timestamp in seconds when take snapshot of current counters
+    int64_t _timestamp;
 };
 
 } // end namespace dsn::utils
diff --git a/src/core/perf_counter/perf_counters.cpp b/src/core/perf_counter/perf_counters.cpp
index 9cedd2d1dc..826893a319 100644
--- a/src/core/perf_counter/perf_counters.cpp
+++ b/src/core/perf_counter/perf_counters.cpp
@@ -201,7 +201,7 @@ std::string perf_counters::list_snapshot_by_regexp(const std::vector<std::string
     }
 
     std::stringstream ss;
-    info.timestamp = dsn_now_ms() / 1000;
+    info.timestamp = _timestamp;
     char buf[20];
     utils::time_ms_to_date_time(info.timestamp * 1000, buf, sizeof(buf));
     info.timestamp_str = buf;
@@ -236,6 +236,8 @@ void perf_counters::take_snapshot()
         }
     }
 
+    _timestamp = dsn_now_ms() / 1000;
+
     // delete old counters
     std::vector<std::string> old_counters;
     for (auto &p : _snapshots)