diff --git a/cmd/line.go b/cmd/line.go
index 22f880a..6937843 100644
--- a/cmd/line.go
+++ b/cmd/line.go
@@ -62,7 +62,7 @@ func parseSingleContainerLine(line []byte) (u singleLine, err error) {
 	return u, err
 }
 
-func (s *submitter) parseContainerLines(unparsed <-chan rawLine, parsed chan<- singleLine) {
+func (s *submitter) parseContainerLogLines(unparsed <-chan rawLine, parsed chan<- singleLine) {
 	for {
 		raw, ok := <-unparsed
 		if !ok {
@@ -73,7 +73,7 @@ func (s *submitter) parseContainerLines(unparsed <-chan rawLine, parsed chan<- s
 		line, err := parseSingleContainerLine(raw.line)
 		if err != nil {
 			promRecordPrefixParsingErr.WithLabelValues(raw.File).Add(1)
-			s.l.Error("parsing single container line", zap.Error(err), zap.String("file", raw.File))
+			s.l.Error("parsing container log line", zap.Error(err), zap.String("file", raw.File))
 		}
 
 		line.mLog.recordMetadata = raw.recordMetadata
@@ -84,7 +84,7 @@ func (s *submitter) parseContainerLines(unparsed <-chan rawLine, parsed chan<- s
 // assumes all lines are from same file
 func (s *submitter) parseLines(bufferLimitBytes int, unparsed <-chan rawLine, parsed chan<- mLog) {
 	lines := make(chan singleLine)
-	go s.parseContainerLines(unparsed, lines)
+	go s.parseContainerLogLines(unparsed, lines)
 
 	var wg sync.WaitGroup
 	wg.Add(2)
@@ -151,6 +151,7 @@ func (s *submitter) parseStdChannel(bufferLimitBytes int, lines <-chan singleLin
 		if len(buffer) > bufferLimitBytes {
 			buffer = nil
 			promRecordDroppedTooLarge.WithLabelValues(line.File).Add(1)
+			s.l.Warn("dropped record: too large", zap.Int("cap_bytes", bufferLimitBytes))
 			continue
 		}
 
diff --git a/cmd/mongo.go b/cmd/mongo.go
index a17eecc..854f635 100644
--- a/cmd/mongo.go
+++ b/cmd/mongo.go
@@ -2,7 +2,6 @@ package logmower
 
 import (
 	"context"
-	"fmt"
 	"time"
 
 	prom "github.com/prometheus/client_golang/prometheus"
@@ -45,7 +44,7 @@ func mongoMonitoredClientOptions(l *zap.Logger) *mongoOpt.ClientOptions {
 			},
 			ServerHeartbeatFailed: func(ev *mongoEvent.ServerHeartbeatFailedEvent) {
 				promDbHeartbeat.WithLabelValues(ev.ConnectionID).Observe(0)
-				l.Error("database heartbeat", zap.Error(ev.Failure), zap.String("connection_id", ev.ConnectionID))
+				l.Warn("database heartbeat", zap.Error(ev.Failure), zap.String("connection_id", ev.ConnectionID))
 			},
 		}).
 		SetMonitor(&mongoEvent.CommandMonitor{
@@ -56,7 +55,6 @@ func mongoMonitoredClientOptions(l *zap.Logger) *mongoOpt.ClientOptions {
 				promDbCmd.WithLabelValues(ev.ConnectionID, ev.CommandName).Observe(time.Duration(ev.DurationNanos).Seconds())
 
 				promDbCmdErr.WithLabelValues(ev.ConnectionID, ev.CommandName).Add(1)
-				l.Error("database command", zap.Error(fmt.Errorf("%s", ev.Failure)), zap.String("connection_id", ev.ConnectionID), zap.String("command_name", ev.CommandName)) // TODO: https://github.com/mongodb/mongo-go-driver/pull/1105
 			},
 		})
 }
diff --git a/cmd/sender.go b/cmd/sender.go
index b78cd9c..900341a 100644
--- a/cmd/sender.go
+++ b/cmd/sender.go
@@ -97,11 +97,12 @@ func (s *submitter) sender(name string, sendQueue <-chan mLog) {
 		}
 
 		result, err := s.db.InsertMany(mongoTimeoutCtx(context.Background()), batchBson, nil)
-		promShipperDbSent.WithLabelValues(baseName).Add(float64(
-			len(result.InsertedIDs)))
-
 		if err != nil {
 			s.l.Error("submission to database", zap.Error(err)) // TODO: add some selective retry here or something
+			continue
 		}
+
+		promShipperDbSent.WithLabelValues(baseName).Add(float64(
+			len(result.InsertedIDs)))
 	}
 }
diff --git a/cmd/watcher.go b/cmd/watcher.go
index 97e5298..7f30960 100644
--- a/cmd/watcher.go
+++ b/cmd/watcher.go
@@ -184,11 +184,11 @@ var App = &cli.App{
 					_, ok = parseLogName(event.Name)
 					if !ok {
 						promWatcherFilesSkipped.Add(1)
+						l.Warn("skipped file with unparsable name", zap.String("name", event.Name))
 						continue
 					}
 
 					promWatcherFilesStarted.Add(1)
-					l.Debug("digesting new file", zap.String("name", event.Name))
 
 					wg.Add(1)
 					go func() {