diff --git a/chain/sync.go b/chain/sync.go
index 9c87136a1..b8018c793 100644
--- a/chain/sync.go
+++ b/chain/sync.go
@@ -1022,6 +1022,8 @@ func (syncer *Syncer) iterFullTipsets(ctx context.Context, headers []*types.TipS
 	ctx, span := trace.StartSpan(ctx, "iterFullTipsets")
 	defer span.End()
 
+	span.AddAttributes(trace.Int64Attribute("num_headers", int64(len(headers))))
+
 	windowSize := 200
 	for i := len(headers) - 1; i >= 0; {
 		fts, err := syncer.store.TryFillTipSet(headers[i])
diff --git a/cmd/lotus/main.go b/cmd/lotus/main.go
index 5ce4833b8..2892d9358 100644
--- a/cmd/lotus/main.go
+++ b/cmd/lotus/main.go
@@ -20,6 +20,7 @@ func main() {
 	logging.SetLogLevel("swarm2", "WARN")
 	logging.SetLogLevel("bitswap", "WARN")
 	logging.SetLogLevel("pubsub", "WARN")
+	logging.SetLogLevel("connmgr", "WARN")
 
 	local := []*cli.Command{
 		DaemonCmd,