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Cherry pick #103065 to 26.2: Expose per-thread untracked_memory in system.stack_trace#103197
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robot-clickhouse-ci-2 merged 2 commits intoApr 20, 2026
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Adds a new `untracked_memory` column to `system.stack_trace` that reports the per-thread atomic-less allocation counter (`ThreadStatus::untracked_memory`) which has not yet been propagated to the parent `MemoryTracker`. The value is read in the signal handler running in the target thread's context (signal-safe, plain `Int64` load), and the type is `Int64` since the counter can go negative between flushes. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Expose per-thread untracked_memory in system.stack_trace
robot-clickhouse-ci-2
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pr-cherrypick
robot-clickhouse-ci-2
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Original pull-request #103065
Do not merge this PR manually
This pull-request is a first step of an automated backporting.
It contains changes similar to calling
git cherry-picklocally.If you intend to continue backporting the changes, then resolve all conflicts if any.
Otherwise, if you do not want to backport them, then just close this pull-request.
The check results does not matter at this step - you can safely ignore them.
Troubleshooting
If the conflicts were resolved in a wrong way
If this cherry-pick PR is completely screwed by a wrong conflicts resolution, and you want to recreate it:
pr-cherrypicklabel from the PRYou also need to check the Original pull-request for
pr-backports-createdlabel, and delete if it's presented thereThe PR source
The PR is created in the CI job