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[data] Set default actor pool scale up threshold to 1.75 #59512

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Merged
alexeykudinkin merged 3 commits into from
Dec 19, 2025
Merged

[data] Set default actor pool scale up threshold to 1.75 #59512

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29d10ba
[data] Set default actor pool scale up threshold to 1.75
iamjustinhsu Dec 17, 2025
940d47d
fix test
iamjustinhsu Dec 17, 2025
143fa28
rebase
iamjustinhsu Dec 18, 2025
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2 changes: 1 addition & 1 deletion python/ray/data/context.py
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Original file line number Diff line number Diff line change
Expand Up @@ -237,7 +237,7 @@ class ShuffleStrategy(str, enum.Enum):

DEFAULT_ACTOR_POOL_UTIL_UPSCALING_THRESHOLD: float = env_float(
"RAY_DATA_DEFAULT_ACTOR_POOL_UTIL_UPSCALING_THRESHOLD",
2.0,
1.75,
)

DEFAULT_ACTOR_POOL_UTIL_DOWNSCALING_THRESHOLD: float = env_float(
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2 changes: 1 addition & 1 deletion python/ray/data/tests/test_autoscaler.py
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Expand Up @@ -454,7 +454,7 @@ def __call__(self, row):
expected_message = (
"⚠️ Actor Pool configuration of the "
"ActorPoolMapOperator[MapBatches(SimpleMapper)] will not allow it to scale up: "
"configured utilization threshold (200.0%) couldn't be reached with "
"configured utilization threshold (175.0%) couldn't be reached with "
"configured max_concurrency=1 and max_tasks_in_flight_per_actor=1 "
"(max utilization will be max_tasks_in_flight_per_actor / max_concurrency = 100%)"
)
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