Repository: pingcap/tidb (go)

Issue:
disable 'import-mode' when using global sort
## Enhance

<!-- a step by step guide for reproducing the bug. -->
'import mode' is enabled previously to avoid TiKV into write stale and flow control, to make import success even through there are a lot of range overlap and some SST might ingested into L0, but with global sort, we can make sure there is no range overlap, it shouldn't ingest into L0 normally, we can disable switching to 'import mode' in this case





Pull request description:
importinto: disable switching to 'import mode' when global sort (#60363)
This is an automated cherry-pick of #60363

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2. *: what's changed

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### What problem does this PR solve?
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Issue Number: close #60361

Problem Summary:

### What changed and how does it work?
disable switch to `import mode` when using global sort, no change for local sort
### Check List

Tests <!-- At least one of them must be included. -->

- [x] Unit test
- [ ] Integration test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test
  > - [ ] I checked and no code files have been changed.
  > <!-- Or your custom  "No need to test" reasons -->

Side effects

- [ ] Performance regression: Consumes more CPU
- [ ] Performance regression: Consumes more Memory
- [ ] Breaking backward compatibility

Documentation

- [ ] Affects user behaviors
- [ ] Contains syntax changes
- [ ] Contains variable changes
- [ ] Contains experimental features
- [ ] Changes MySQL compatibility

### Release note

<!-- compatibility change, improvement, bugfix, and new feature need a release note -->

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

```release-note
None
```


Patch:
diff --git a/pkg/executor/aggregate/agg_hash_executor.go b/pkg/executor/aggregate/agg_hash_executor.go
index 4ffe6e7063..f2b0925f29 100644
--- a/pkg/executor/aggregate/agg_hash_executor.go
+++ b/pkg/executor/aggregate/agg_hash_executor.go
@@ -154,6 +154,8 @@ type HashAggExec struct {
 	spillHelper *parallelHashAggSpillHelper
 	// isChildDrained indicates whether the all data from child has been taken out.
 	isChildDrained bool
+
+	invalidMemoryUsageForTrackingTest bool
 }
 
 // Close implements the Executor Close interface.
@@ -204,7 +206,11 @@ func (e *HashAggExec) Close() error {
 		channel.Clear(e.finalOutputCh)
 		e.executed.Store(false)
 		if e.memTracker != nil {
-			e.memTracker.ReplaceBytesUsed(0)
+			if e.memTracker.BytesConsumed() < 0 {
+				e.invalidMemoryUsageForTrackingTest = true
+			} else {
+				e.memTracker.ReplaceBytesUsed(0)
+			}
 		}
 		e.parallelExecValid = false
 		if e.parallelAggSpillAction != nil {
@@ -285,6 +291,8 @@ func (e *HashAggExec) initForUnparallelExec() {
 }
 
 func (e *HashAggExec) initPartialWorkers(partialConcurrency int, finalConcurrency int, ctx sessionctx.Context) {
+	memUsage := int64(0)
+
 	for i := 0; i < partialConcurrency; i++ {
 		partialResultsMap := make([]aggfuncs.AggPartialResultMapper, finalConcurrency)
 		for i := 0; i < finalConcurrency; i++ {
@@ -311,6 +319,8 @@ func (e *HashAggExec) initPartialWorkers(partialConcurrency int, finalConcurrenc
 			inflightChunkSync:    e.inflightChunkSync,
 		}
 
+		memUsage += e.partialWorkers[i].chk.MemoryUsage()
+
 		e.partialWorkers[i].partialResultNumInRow = e.partialWorkers[i].getPartialResultSliceLenConsiderByteAlign()
 		for j := 0; j < finalConcurrency; j++ {
 			e.partialWorkers[i].BInMaps[j] = 0
@@ -328,9 +338,11 @@ func (e *HashAggExec) initPartialWorkers(partialConcurrency int, finalConcurrenc
 			chk:        exec.NewFirstChunk(e.Children(0)),
 			giveBackCh: e.partialWorkers[i].inputCh,
 		}
-		e.memTracker.Consume(input.chk.MemoryUsage())
+		memUsage += input.chk.MemoryUsage()
 		e.inputCh <- input
 	}
+
+	e.memTracker.Consume(memUsage)
 }
 
 func (e *HashAggExec) initFinalWorkers(finalConcurrency int) {
@@ -442,6 +454,7 @@ func (e *HashAggExec) fetchChildData(ctx context.Context, waitGroup *sync.WaitGr
 		ok    bool
 		err   error
 	)
+
 	defer func() {
 		if r := recover(); r != nil {
 			recoveryHashAgg(e.finalOutputCh, r)
@@ -494,6 +507,7 @@ func (e *HashAggExec) fetchChildData(ctx context.Context, waitGroup *sync.WaitGr
 		input.giveBackCh <- chk
 
 		if hasError := e.spillIfNeed(); hasError {
+			e.memTracker.Consume(-mSize)
 			return
 		}
 	}
@@ -857,3 +871,8 @@ func (e *HashAggExec) IsSpillTriggeredForTest() bool {
 	}
 	return false
 }
+
+// IsInvalidMemoryUsageTrackingForTest is for test
+func (e *HashAggExec) IsInvalidMemoryUsageTrackingForTest() bool {
+	return e.invalidMemoryUsageForTrackingTest
+}
diff --git a/pkg/executor/importer/import.go b/pkg/executor/importer/import.go
index 9cbd8b0f99..c0467e97b0 100644
--- a/pkg/executor/importer/import.go
+++ b/pkg/executor/importer/import.go
@@ -79,20 +79,30 @@ const (
 	// 0 means no limit
 	unlimitedWriteSpeed = config.ByteSize(0)
 
-	characterSetOption          = "character_set"
-	fieldsTerminatedByOption    = "fields_terminated_by"
-	fieldsEnclosedByOption      = "fields_enclosed_by"
-	fieldsEscapedByOption       = "fields_escaped_by"
-	fieldsDefinedNullByOption   = "fields_defined_null_by"
-	linesTerminatedByOption     = "lines_terminated_by"
-	skipRowsOption              = "skip_rows"
-	splitFileOption             = "split_file"
-	diskQuotaOption             = "disk_quota"
-	threadOption                = "thread"
-	maxWriteSpeedOption         = "max_write_speed"
-	checksumTableOption         = "checksum_table"
-	recordErrorsOption          = "record_errors"
-	detachedOption              = "detached"
+	characterSetOption        = "character_set"
+	fieldsTerminatedByOption  = "fields_terminated_by"
+	fieldsEnclosedByOption    = "fields_enclosed_by"
+	fieldsEscapedByOption     = "fields_escaped_by"
+	fieldsDefinedNullByOption = "fields_defined_null_by"
+	linesTerminatedByOption   = "lines_terminated_by"
+	skipRowsOption            = "skip_rows"
+	splitFileOption           = "split_file"
+	diskQuotaOption           = "disk_quota"
+	threadOption              = "thread"
+	maxWriteSpeedOption       = "max_write_speed"
+	checksumTableOption       = "checksum_table"
+	recordErrorsOption        = "record_errors"
+	detachedOption            = "detached"
+	// if 'import mode' enabled, TiKV will:
+	//  - set level0_stop_writes_trigger = max(old, 1 << 30)
+	//  - set level0_slowdown_writes_trigger = max(old, 1 << 30)
+	//  - set soft_pending_compaction_bytes_limit = 0,
+	//  - set hard_pending_compaction_bytes_limit = 0,
+	//  - will not trigger flow control when SST count in L0 is large
+	//  - will not trigger region split, it might cause some region became
+	//    very large and be a hotspot, might cause latency spike.
+	//
+	// default false for local sort, true for global sort.
 	disableTiKVImportModeOption = "disable_tikv_import_mode"
 	cloudStorageURIOption       = "cloud_storage_uri"
 	disablePrecheckOption       = "disable_precheck"
@@ -780,6 +790,9 @@ func (p *Plan) adjustOptions(targetNodeCPUCnt int) {
 			zap.Int("before", p.ThreadCnt), zap.Int("after", limit))
 		p.ThreadCnt = limit
 	}
+	if p.IsGlobalSort() {
+		p.DisableTiKVImportMode = true
+	}
 }
 
 func (p *Plan) initParameters(plan *plannercore.ImportInto) error {


Test patch:
diff --git a/pkg/executor/aggregate/agg_spill_test.go b/pkg/executor/aggregate/agg_spill_test.go
index 253856249c..600e735a75 100644
--- a/pkg/executor/aggregate/agg_spill_test.go
+++ b/pkg/executor/aggregate/agg_spill_test.go
@@ -150,6 +150,7 @@ func generateResult(t *testing.T, ctx *mock.Context, dataSource *testutil.MockDa
 			resultRows = append(resultRows, chk.GetRow(i))
 		}
 	}
+	require.False(t, aggExec.IsInvalidMemoryUsageTrackingForTest())
 	aggExec.Close()
 
 	require.False(t, aggExec.IsSpillTriggeredForTest())
@@ -315,6 +316,7 @@ func executeCorrecResultTest(t *testing.T, ctx *mock.Context, aggExec *aggregate
 			resultRows = append(resultRows, chk.GetRow(i))
 		}
 	}
+	require.False(t, aggExec.IsInvalidMemoryUsageTrackingForTest())
 	aggExec.Close()
 
 	require.True(t, aggExec.IsSpillTriggeredForTest())
@@ -351,6 +353,7 @@ func fallBackActionTest(t *testing.T) {
 		}
 		chk.Reset()
 	}
+	require.False(t, aggExec.IsInvalidMemoryUsageTrackingForTest())
 	aggExec.Close()
 	require.Less(t, 0, newRootExceedAction.GetTriggeredNum())
 }
@@ -373,6 +376,7 @@ func randomFailTest(t *testing.T, ctx *mock.Context, aggExec *aggregate.HashAggE
 	go func() {
 		time.Sleep(time.Duration(rand.Int31n(300)) * time.Millisecond)
 		once.Do(func() {
+			require.False(t, aggExec.IsInvalidMemoryUsageTrackingForTest())
 			aggExec.Close()
 		})
 		goRoutineWaiter.Done()
@@ -382,6 +386,7 @@ func randomFailTest(t *testing.T, ctx *mock.Context, aggExec *aggregate.HashAggE
 		err := aggExec.Next(tmpCtx, chk)
 		if err != nil {
 			once.Do(func() {
+				require.False(t, aggExec.IsInvalidMemoryUsageTrackingForTest())
 				err = aggExec.Close()
 				require.Equal(t, nil, err)
 			})
@@ -393,6 +398,7 @@ func randomFailTest(t *testing.T, ctx *mock.Context, aggExec *aggregate.HashAggE
 		chk.Reset()
 	}
 	once.Do(func() {
+		require.False(t, aggExec.IsInvalidMemoryUsageTrackingForTest())
 		aggExec.Close()
 	})
 }
diff --git a/pkg/executor/importer/import_test.go b/pkg/executor/importer/import_test.go
index 9ebd90a276..014a001c4d 100644
--- a/pkg/executor/importer/import_test.go
+++ b/pkg/executor/importer/import_test.go
@@ -189,11 +189,17 @@ func TestAdjustOptions(t *testing.T) {
 	plan.adjustOptions(16)
 	require.Equal(t, 16, plan.ThreadCnt)
 	require.Equal(t, config.ByteSize(10), plan.MaxWriteSpeed) // not adjusted
+	require.False(t, plan.DisableTiKVImportMode)
 
 	plan.ThreadCnt = 100000000
 	plan.DataSourceType = DataSourceTypeQuery
 	plan.adjustOptions(16)
 	require.Equal(t, 32, plan.ThreadCnt)
+	require.False(t, plan.DisableTiKVImportMode)
+
+	plan.CloudStorageURI = "s3://bucket/path"
+	plan.adjustOptions(16)
+	require.True(t, plan.DisableTiKVImportMode)
 }
 
 func TestAdjustDiskQuota(t *testing.T) {
diff --git a/tests/realtikvtest/importintotest3/from_server_test.go b/tests/realtikvtest/importintotest3/from_server_test.go
index d41e44afe2..544446e9d7 100644
--- a/tests/realtikvtest/importintotest3/from_server_test.go
+++ b/tests/realtikvtest/importintotest3/from_server_test.go
@@ -73,4 +73,5 @@ func (s *mockGCSSuite) TestImportFromServer() {
 	var taskMeta importinto.TaskMeta
 	require.NoError(s.T(), json.Unmarshal(task.Meta, &taskMeta))
 	require.Len(s.T(), taskMeta.ChunkMap, 2)
+	require.False(s.T(), taskMeta.Plan.DisableTiKVImportMode)
 }
diff --git a/tests/realtikvtest/importintotest4/global_sort_test.go b/tests/realtikvtest/importintotest4/global_sort_test.go
index 7f9a8c6982..f6b03c8cab 100644
--- a/tests/realtikvtest/importintotest4/global_sort_test.go
+++ b/tests/realtikvtest/importintotest4/global_sort_test.go
@@ -96,6 +96,7 @@ func (s *mockGCSSuite) TestGlobalSortBasic() {
 	taskMeta := importinto.TaskMeta{}
 	s.NoError(json.Unmarshal(task.Meta, &taskMeta))
 	urlEqual(s.T(), redactedSortStorageURI, taskMeta.Plan.CloudStorageURI)
+	require.True(s.T(), taskMeta.Plan.DisableTiKVImportMode)
 
 	// merge-sort data kv
 	s.tk.MustExec("truncate table t")