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executor: AnalyzePartitionConcurrency is not more than number of task #47463

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merged 2 commits into from
Oct 9, 2023
Merged

executor: AnalyzePartitionConcurrency is not more than number of task #47463

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executor: AnalyzePartitionConcurrency is not more than number of task
hawkingrei Oct 8, 2023
489b259
executor: AnalyzePartitionConcurrency is not more than number of task
hawkingrei Oct 8, 2023
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5 changes: 4 additions & 1 deletion executor/analyze.go
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Original file line number Diff line number Diff line change
Expand Up @@ -122,7 +122,7 @@ func (e *AnalyzeExec) Next(ctx context.Context, _ *chunk.Chunk) error {
globalStatsMap := make(map[globalStatsKey]globalStatsInfo)
g, _ := errgroup.WithContext(ctx)
g.Go(func() error {
return e.handleResultsError(ctx, concurrency, needGlobalStats, globalStatsMap, resultsCh)
return e.handleResultsError(ctx, concurrency, needGlobalStats, globalStatsMap, resultsCh, len(tasks))
})

for _, task := range tasks {
Expand Down Expand Up @@ -353,8 +353,11 @@ func (e *AnalyzeExec) handleResultsError(
needGlobalStats bool,
globalStatsMap globalStatsMap,
resultsCh <-chan *statistics.AnalyzeResults,
taskNum int,
) error {
partitionStatsConcurrency := e.Ctx().GetSessionVars().AnalyzePartitionConcurrency
// the concurrency of handleResultsError cannot be more than partitionStatsConcurrency
partitionStatsConcurrency = min(taskNum, partitionStatsConcurrency)
// If partitionStatsConcurrency > 1, we will try to demand extra session from Domain to save Analyze results in concurrency.
// If there is no extra session we can use, we will save analyze results in single-thread.
if partitionStatsConcurrency > 1 {
Expand Down