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store/tikv: limit batch split count for one request (#18191) #18694

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merged 2 commits into from
Jul 24, 2020
Merged

store/tikv: limit batch split count for one request (#18191) #18694

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c8d51fa
cherry pick #18191 to release-3.0
Connor1996 Jul 21, 2020
1c21fe5
Merge branch 'release-3.0' into release-3.0-49406ac5aefe
ti-srebot Jul 24, 2020
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4 changes: 3 additions & 1 deletion store/tikv/split_region.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,8 @@ import (
"go.uber.org/zap"
)

const splitBatchRegionLimit = 16

func equalRegionStartKey(key, regionStartKey []byte) bool {
if bytes.Equal(key, regionStartKey) {
return true
Expand All @@ -48,7 +50,7 @@ func (s *tikvStore) splitBatchRegionsReq(bo *Backoffer, keys [][]byte, scatter b

var batches []batch
for regionID, groupKeys := range groups {
batches = appendKeyBatches(batches, regionID, groupKeys, rawBatchPutSize)
batches = appendKeyBatches(batches, regionID, groupKeys, splitBatchRegionLimit)
}

if len(batches) == 0 {
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