docs: clarifying the help message and documentation for aggregate-cal…

…lees in CLI.

cmd/profilecli/query.go

@@ -154,7 +154,7 @@ func addQueryGoPGOParams(queryCmd commander) *queryGoPGOParams {
 	params := new(queryGoPGOParams)
 	params.queryProfileParams = addQueryProfileParams(queryCmd)
 	queryCmd.Flag("keep-locations", "Number of leaf locations to keep.").Default("5").Uint32Var(&params.KeepLocations)
-	queryCmd.Flag("aggregate-callees", "Default: false. Aggregate samples for the same callee by ignoring the line numbers in the leaf locations. Use --aggregate-callees to enable or --no-aggregate-callees to disable.").Default("false").BoolVar(&params.AggregateCallees)
+	queryCmd.Flag("aggregate-callees", "Default: true. Aggregate samples for the same callee by ignoring the line numbers in the leaf locations. Use --aggregate-callees to enable or --no-aggregate-callees to disable.").Default("true").BoolVar(&params.AggregateCallees)
 	return params
 }
 

docs/sources/view-and-analyze-profile-data/profile-cli.md

@@ -289,7 +289,7 @@ By default, it looks for samples within the last hour, though this can be contro
     - You can provide a custom time range using the `--from` and `--to` flags, for example, `--from="now-3h" --to="now"`.
     - You can specify the profile type via the `--profile-type` flag. The available profile types are listed in the output of the `profilecli query series` command.
     - You can specify the number of leaf locations to keep via the `--keep-locations` flag. The default value is `5`. The Go compiler does not use the full stack trace. Reducing the number helps to minimize the profile size.
-    - You can specify whether the callee aggregation should be used via the `--aggregate-callees` flag. By default, samples are aggregated by the leaf location, ignoring callee line number. Go compiler ignores this information.
+    - You can specify whether the callee aggregation should be used via the `--aggregate-callees` flag. By default, this setting is true, samples are aggregated by the leaf location, ignoring callee line number. Go compiler ignores this information. You can use `--no-aggregate-callees` to disable aggregation. Try both options to see which gives better for your PGO.
 
 2. Construct and execute the command.