Keep the minRev between syncWatchers loops

server/storage/mvcc/watchable_store.go

@@ -357,12 +357,21 @@ func (s *watchableStore) syncWatchers(evs []mvccpb.Event) (int, []mvccpb.Event)
 	curRev := s.store.currentRev
 	compactionRev := s.store.compactMainRev
 
-	wg, minRev := s.unsynced.choose(maxWatchersPerSync, curRev, compactionRev)
+	minRev := s.unsynced.chooseAll(curRev, compactionRev)
+	for _, batch := range s.victims {
+		for w, b := range batch {
+			watcherRev := max(w.minRev, b.moreRev)
+			if len(b.evs) > 0 {
+				watcherRev = max(watcherRev, b.evs[len(b.evs)-1].Kv.ModRevision)
+			}
+			minRev = min(minRev, watcherRev)
+		}
+	}
 	evs = rangeEventsWithReuse(s.store.lg, s.store.b, evs, minRev, curRev+1)
 
 	victims := make(watcherBatch)
-	wb := newWatcherBatch(wg, evs)
-	for w := range wg.watchers {
+	wb := newWatcherBatch(&s.unsynced, evs)
+	for w := range s.unsynced.watchers {
 		if w.minRev < compactionRev {
 			// Skip the watcher that failed to send compacted watch response due to w.ch is full.
 			// Next retry of syncWatchers would try to resend the compacted watch response to w.ch