fix routine load metrics

Author: cambyzju

fe/fe-core/src/main/java/org/apache/doris/load/routineload/RoutineLoadJob.java

@@ -907,7 +907,7 @@ private void updateNumOfData(long numOfTotalRows, long numOfErrorRows, long unse
             MetricRepo.COUNTER_ROUTINE_LOAD_ERROR_ROWS.increase(numOfErrorRows);
             MetricRepo.COUNTER_ROUTINE_LOAD_RECEIVED_BYTES.increase(receivedBytes);
             MetricRepo.COUNTER_ROUTINE_LOAD_TASK_EXECUTE_TIME.increase(taskExecutionTime);
-            MetricRepo.COUNTER_ROUTINE_LOAD_TASK_EXECUTE_TIME.increase(1L);
+            MetricRepo.COUNTER_ROUTINE_LOAD_TASK_EXECUTE_COUNT.increase(1L);
         }
 
         // check error rate

fe/fe-core/src/main/java/org/apache/doris/metric/MetricRepo.java

@@ -635,7 +635,7 @@ public Long getValue() {
                 MetricUnit.MILLISECONDS, "task execute time of routine load");
         DORIS_METRIC_REGISTER.addMetrics(COUNTER_ROUTINE_LOAD_TASK_EXECUTE_TIME);
         COUNTER_ROUTINE_LOAD_TASK_EXECUTE_COUNT = new LongCounterMetric("routine_load_task_execute_count",
-                MetricUnit.MILLISECONDS, "task execute count of routine load");
+                MetricUnit.NOUNIT, "task execute count of routine load");
         DORIS_METRIC_REGISTER.addMetrics(COUNTER_ROUTINE_LOAD_TASK_EXECUTE_COUNT);
 
         COUNTER_HIT_SQL_BLOCK_RULE = new LongCounterMetric("counter_hit_sql_block_rule", MetricUnit.ROWS,