Merge pull request #19411 from k8s-infra-cherrypick-robot/cherry-pick-19410-to-release-3.6

[release-3.6] Fix a performance regression due to uncertain compaction sleep interval

Author: serathius

server/storage/mvcc/kvstore_compaction.go

@@ -40,8 +40,6 @@ func (s *store) scheduleCompaction(compactMainRev, prevCompactRev int64) (KeyVal
 	binary.BigEndian.PutUint64(end, uint64(compactMainRev+1))
 
 	batchNum := s.cfg.CompactionBatchLimit
-	batchTicker := time.NewTicker(s.cfg.CompactionSleepInterval)
-	defer batchTicker.Stop()
 	h := newKVHasher(prevCompactRev, compactMainRev, keep)
 	last := make([]byte, 8+1+8)
 	for {
@@ -91,7 +89,7 @@ func (s *store) scheduleCompaction(compactMainRev, prevCompactRev int64) (KeyVal
 		dbCompactionPauseMs.Observe(float64(time.Since(start) / time.Millisecond))
 
 		select {
-		case <-batchTicker.C:
+		case <-time.After(s.cfg.CompactionSleepInterval):
 		case <-s.stopc:
 			return KeyValueHash{}, fmt.Errorf("interrupted due to stop signal")
 		}