liukun4515 commented on code in PR #124:
URL: https://github.com/apache/arrow-ballista/pull/124#discussion_r945447163


##########
ballista/rust/core/proto/ballista.proto:
##########
@@ -503,6 +504,41 @@ message ColumnStats {
   uint32 distinct_count = 4;
 }
 
+message OperatorMetricsSet {
+  repeated OperatorMetric metrics = 1;
+}
+
+
+message NamedCount {
+  string name = 1;
+  uint64 value = 2;
+}
+
+message NamedGauge {
+  string name = 1;
+  uint64 value = 2;

Review Comment:
   @andygrove @alamb 
   Can we collation two side?
   The `Gauge` use the signed integer to store the value.
   https://github.com/apache/arrow-datafusion/pull/1682
   



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