fix: improve tracing feature#3688

Merged

andygrove merged 32 commits intoapache:mainfrom

andygrove:improve-tracing

Apr 10, 2026

Commits on Mar 13, 2026

fix: improve Chrome trace event format correctness and metric naming
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Commits on Mar 18, 2026

style: format tracing.md with prettier
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Commits on Apr 9, 2026

fix: use stable API for getting thread ID in tracing

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Merge remote-tracking branch 'apache/main' into improve-tracing
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feat: trace memory pool reserved bytes for comparing accounting vs actual usage

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cargo fmt
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feat: improve tracing by adding task ID to memory_pool_reserved metric and logging memory after execution

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feat: use thread ID for tracing metrics and rename for consistency

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use java thread id
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switch to ctx id not thread id
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pad context ID to six digits in tracing metric names for lexicographic ordering

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fix: emit comet_memory_reserved=0 on releasePlan so tracing shows memory drop

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use Java thread ID for tracing memory metrics so multiple contexts on same thread aggregate into one series

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sum memory reservations across all contexts on same thread for tracing

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drop per-context comet_memory and spark_memory tracing metrics in favor of summed comet_memory_reserved

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simplify tracing: pre-compute metric name, unify poll counters, use parking_lot::Mutex

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update tracing docs: fix inaccuracies, update screenshot

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prep for review
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Commits on Apr 10, 2026