Skip to content

planner: avoid exceeding the configured concurrency limit (#61786) #61815

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Jun 25, 2025
Merged

planner: avoid exceeding the configured concurrency limit (#61786) #61815

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
1c1b7cc
This is an automated cherry-pick of #61786
hawkingrei Jun 18, 2025
70d9360
update
hawkingrei Jun 19, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
27 changes: 7 additions & 20 deletions pkg/executor/analyze_col_v2.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -92,21 +92,8 @@ func (e *AnalyzeColumnsExecV2) analyzeColumnsPushDownV2(gp *gp.Pool) *statistics
e.memTracker.Release(e.memTracker.BytesConsumed())
return &statistics.AnalyzeResults{Err: err, Job: e.job}
}
statsConcurrncy, err := getBuildStatsConcurrency(e.ctx)
if err != nil {
e.memTracker.Release(e.memTracker.BytesConsumed())
return &statistics.AnalyzeResults{Err: err, Job: e.job}
}
idxNDVPushDownCh := make(chan analyzeIndexNDVTotalResult, 1)
// subIndexWorkerWg is better to be initialized in handleNDVForSpecialIndexes, however if we do so, golang would
// report unexpected/unreasonable data race error on subIndexWorkerWg when running TestAnalyzeVirtualCol test
// case with `-race` flag now.
wg := util.NewWaitGroupPool(gp)
wg.Run(func() {
e.handleNDVForSpecialIndexes(specialIndexes, idxNDVPushDownCh, statsConcurrncy)
})
defer wg.Wait()

e.handleNDVForSpecialIndexes(specialIndexes, idxNDVPushDownCh, samplingStatsConcurrency)
count, hists, topNs, fmSketches, extStats, err := e.buildSamplingStats(gp, ranges, collExtStats, specialIndexesOffsets, idxNDVPushDownCh, samplingStatsConcurrency)
if err != nil {
e.memTracker.Release(e.memTracker.BytesConsumed())
Expand Down Expand Up @@ -439,7 +426,7 @@ func (e *AnalyzeColumnsExecV2) buildSamplingStats(
}

// handleNDVForSpecialIndexes deals with the logic to analyze the index containing the virtual column when the mode is full sampling.
func (e *AnalyzeColumnsExecV2) handleNDVForSpecialIndexes(indexInfos []*model.IndexInfo, totalResultCh chan analyzeIndexNDVTotalResult, statsConcurrncy int) {
func (e *AnalyzeColumnsExecV2) handleNDVForSpecialIndexes(indexInfos []*model.IndexInfo, totalResultCh chan analyzeIndexNDVTotalResult, samplingStatsConcurrency int) {
defer func() {
if r := recover(); r != nil {
logutil.BgLogger().Error("analyze ndv for special index panicked", zap.Any("recover", r), zap.Stack("stack"))
Expand All @@ -455,12 +442,12 @@ func (e *AnalyzeColumnsExecV2) handleNDVForSpecialIndexes(indexInfos []*model.In
AddNewAnalyzeJob(e.ctx, task.job)
}
resultsCh := make(chan *statistics.AnalyzeResults, len(tasks))
if len(tasks) < statsConcurrncy {
statsConcurrncy = len(tasks)
if len(tasks) < samplingStatsConcurrency {
samplingStatsConcurrency = len(tasks)
}
var subIndexWorkerWg = NewAnalyzeResultsNotifyWaitGroupWrapper(resultsCh)
subIndexWorkerWg.Add(statsConcurrncy)
for i := 0; i < statsConcurrncy; i++ {
subIndexWorkerWg.Add(samplingStatsConcurrency)
for range samplingStatsConcurrency {
subIndexWorkerWg.Run(func() { e.subIndexWorkerForNDV(taskCh, resultsCh) })
}
for _, task := range tasks {
Expand All @@ -473,7 +460,7 @@ func (e *AnalyzeColumnsExecV2) handleNDVForSpecialIndexes(indexInfos []*model.In
}
var err error
statsHandle := domain.GetDomain(e.ctx).StatsHandle()
for panicCnt < statsConcurrncy {
for panicCnt < samplingStatsConcurrency {
results, ok := <-resultsCh
if !ok {
break
Expand Down