MergeGlobalStatsTopNByConcurrency merge partition topN by concurrency.

MergePartitionStats2GlobalStats merge the partition-level stats to global-level stats based on the tableInfo.

MergePartitionStats2GlobalStatsByTableID merge the partition-level stats to global-level stats based on the tableID.

MergePartTopN2GlobalTopN is used to merge the partition-level topN to global-level topN.

NewAsyncMergePartitionStats2GlobalStats creates a new AsyncMergePartitionStats2GlobalStats.

NewStatsGlobal creates a new StatsGlobal.

NewStatsWrapper returns wrapper.

NewTopnStatsMergeTask returns task.

NewTopnStatsMergeWorker returns topn merge worker.

WriteGlobalStatsToStorage is to write global stats to storage.

MaxPartitionMergeBatchSize indicates the max batch size for a worker to merge partition stats.

AsyncMergePartitionStats2GlobalStats is used to merge partition stats to global stats.

GlobalStats is used to store the statistics contained in the global-level stats which is generated by the merge of partition-level stats.

StatsWrapper wrapper stats.

TopnStatsMergeResponse indicates topn merge worker response.

TopnStatsMergeTask indicates a task for merge topn stats.