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sorter: correct wrong metric about next duration #11577

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Sep 9, 2024
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sorter: correct wrong metric about next duration #11577

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10 changes: 4 additions & 6 deletions cdc/processor/sourcemanager/sorter/pebble/event_sorter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -311,22 +311,20 @@ func (s *EventSorter) SlotsAndHasher() (slotCount int, hasher func(tablepb.Span,
// fetched or not.
func (s *EventIter) Next() (event *model.PolymorphicEvent, txnFinished sorter.Position, err error) {
valid := s.iter != nil && s.iter.Valid()
var value []byte
var nextEvent *model.PolymorphicEvent

// We need to decide whether the current event is the last event in this transactions
// If the current event is the last one, we need to set txnFinished
// Thus, we need to fetch the next event and compare the commitTs and startTs with it
for valid {
nextStart := time.Now()
value = s.iter.Value()
s.nextDuration.Observe(time.Since(nextStart).Seconds())

nextEvent = &model.PolymorphicEvent{}
if _, err = s.serde.Unmarshal(nextEvent, value); err != nil {
if _, err = s.serde.Unmarshal(nextEvent, s.iter.Value()); err != nil {
return
}

nextStart := time.Now()
valid = s.iter.Next()
s.nextDuration.Observe(time.Since(nextStart).Seconds())

if s.currentEvent != nil {
break
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