[VL] Add waitForPreloadSplitNanos in metric#11024
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FelixYBW merged 1 commit intoapache:mainfrom Nov 5, 2025
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FelixYBW
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Nov 5, 2025
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What changes are proposed in this pull request?
Add
waitForPreloadSplitNanosin the metricdata source add split time.dataSourceAddSplitWallNanoscounts the time when the split isn't prefetched.waitForPreloadSplitNanoscounts the time when the split is prefetched but not finished when table scan read it.Both metrics count time in table scan thread(main task thread) only.
preloadSplitPrepareTimeNanoscounts the accumulated time of all prefetched split. It may count time in I/O threadHow was this patch tested?
under test