Replace per-TI session.merge() with a single UPDATE keyed on TI.id when a dagrun_timeout fires#67198
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ColtenOuO wants to merge 1 commit into
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Replace per-TI session.merge() with a single UPDATE keyed on TI.id when a dagrun_timeout fires#67198ColtenOuO wants to merge 1 commit into
ColtenOuO wants to merge 1 commit into
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…en a dagrun_timeout fires.
boring-cyborg
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When
dagrun_timeoutfires, the scheduler loaded every unfinished TaskInstance, set its state in Python, and calledsession.merge()per row. The TIs are already attached to the session, so the merge is redundant and the ORM unit-of-work flush emits one UPDATE per row — N statements for N tasks.This PR replaces the loop with a single
update(TI).where(TI.id.in_(...))andsynchronize_session="fetch", matching the bulk pattern already used at scheduler_job_runner.py:798-803 and aligning with the AGENTS.md rule to batch scheduler DELETE/UPDATE (#66908).Behaviour is unchanged.