jason810496 commented on code in PR #71816:
URL: https://github.com/apache/airflow/pull/71816#discussion_r3954737498
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airflow-core/src/airflow/jobs/scheduler_job_runner.py:
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@@ -301,6 +290,30 @@ def _is_parent_process() -> bool:
return multiprocessing.current_process().name == "MainProcess"
+def _create_scheduler_dag_bag() -> CachedDBDagBag:
+ """
+ Build the scheduler's DagBag from the ``[scheduler]`` cache options.
+
+ Defaults to an LRU cache of 512 versions with no TTL. A size limit is the
only hard ceiling:
+ each re-check resets an entry's expiry, so a TTL reclaims a version only
once its runs finish
+ and it stops being requested, bounding memory by the concurrently active
set rather than
+ outright. With both limits disabled, retain loaded Dags without eviction
for the process
+ lifetime.
+ """
+ cache_size = conf.getint("scheduler", "dag_cache_size", fallback=512)
+ cache_ttl = conf.getint("scheduler", "dag_cache_ttl", fallback=0)
Review Comment:
Addressed in c787d97eaa and updated the outdated PR description
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