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statistics: check Killed in the GenJSONTableFromStats (#47778) #47823

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merged 2 commits into from
Nov 6, 2023
Merged

statistics: check Killed in the GenJSONTableFromStats (#47778) #47823

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1765b5a
This is an automated cherry-pick of #47778
hawkingrei Oct 20, 2023
676dfd8
update
hawkingrei Nov 6, 2023
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2 changes: 1 addition & 1 deletion domain/plan_replayer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -319,7 +319,7 @@ func (h *planReplayerTaskDumpHandle) dumpPlanReplayerDumpTask(task *PlanReplayer
if !ok {
return false
}
r, err := handle.GenJSONTableFromStats(schema.Name.String(), tbl.Meta(), stat.(*statistics.Table))
r, err := handle.GenJSONTableFromStats(h.sctx, schema.Name.String(), tbl.Meta(), stat.(*statistics.Table))
if err != nil {
logutil.BgLogger().Warn("generate plan replayer capture task json stats failed",
zap.String("sqlDigest", taskKey.SQLDigest),
Expand Down
39 changes: 35 additions & 4 deletions statistics/handle/dump.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import (
"compress/gzip"
"encoding/json"
"io/ioutil"
"sync/atomic"
"time"

"github.com/pingcap/errors"
Expand All @@ -30,6 +31,7 @@ import (
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/statistics"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/util/memory"
"github.com/pingcap/tidb/util/sqlexec"
"github.com/pingcap/tipb/go-tipb"
)
Expand Down Expand Up @@ -101,6 +103,20 @@ type jsonColumn struct {
StatsVer *int64 `json:"stats_ver"`
}

// TotalMemoryUsage returns the total memory usage of this column.
func (col *jsonColumn) TotalMemoryUsage() (size int64) {
if col.Histogram != nil {
size += int64(col.Histogram.Size())
}
if col.CMSketch != nil {
size += int64(col.CMSketch.Size())
}
if col.FMSketch != nil {
size += int64(col.FMSketch.Size())
}
return size
}

func dumpJSONCol(hist *statistics.Histogram, CMSketch *statistics.CMSketch, topn *statistics.TopN, FMSketch *statistics.FMSketch, statsVer *int64) *jsonColumn {
jsonCol := &jsonColumn{
Histogram: statistics.HistogramToProto(hist),
Expand Down Expand Up @@ -169,7 +185,10 @@ func (h *Handle) DumpStatsToJSONBySnapshot(dbName string, tableInfo *model.Table
}

// GenJSONTableFromStats generate jsonTable from tableInfo and stats
func GenJSONTableFromStats(dbName string, tableInfo *model.TableInfo, tbl *statistics.Table) (*JSONTable, error) {
func GenJSONTableFromStats(sctx sessionctx.Context, dbName string, tableInfo *model.TableInfo, tbl *statistics.Table) (*JSONTable, error) {
tracker := memory.NewTracker(memory.LabelForAnalyzeMemory, -1)
tracker.AttachTo(sctx.GetSessionVars().MemTracker)
defer tracker.Detach()
jsonTbl := &JSONTable{
DatabaseName: dbName,
TableName: tableInfo.Name.L,
Expand All @@ -184,11 +203,21 @@ func GenJSONTableFromStats(dbName string, tableInfo *model.TableInfo, tbl *stati
if err != nil {
return nil, errors.Trace(err)
}
jsonTbl.Columns[col.Info.Name.L] = dumpJSONCol(hist, col.CMSketch, col.TopN, col.FMSketch, &col.StatsVer)
proto := dumpJSONCol(hist, col.CMSketch, col.TopN, col.FMSketch, &col.StatsVer)
tracker.Consume(proto.TotalMemoryUsage())
if atomic.LoadUint32(&sctx.GetSessionVars().Killed) == 1 {
return nil, errors.Trace(statistics.ErrQueryInterrupted)
}
jsonTbl.Columns[col.Info.Name.L] = proto
}

for _, idx := range tbl.Indices {
jsonTbl.Indices[idx.Info.Name.L] = dumpJSONCol(&idx.Histogram, idx.CMSketch, idx.TopN, nil, &idx.StatsVer)
proto := dumpJSONCol(&idx.Histogram, idx.CMSketch, idx.TopN, nil, &idx.StatsVer)
tracker.Consume(proto.TotalMemoryUsage())
if atomic.LoadUint32(&sctx.GetSessionVars().Killed) == 1 {
return nil, errors.Trace(statistics.ErrQueryInterrupted)
}
jsonTbl.Indices[idx.Info.Name.L] = proto
}
jsonTbl.ExtStats = dumpJSONExtendedStats(tbl.ExtendedStats)
return jsonTbl, nil
Expand All @@ -203,7 +232,9 @@ func (h *Handle) tableStatsToJSON(dbName string, tableInfo *model.TableInfo, phy
if err != nil {
return nil, err
}
jsonTbl, err := GenJSONTableFromStats(dbName, tableInfo, tbl)
h.mu.Lock()
defer h.mu.Unlock()
jsonTbl, err := GenJSONTableFromStats(h.mu.ctx, dbName, tableInfo, tbl)
if err != nil {
return nil, err
}
Expand Down