[data] Set default actor pool scale up threshold to 1.75#59512
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alexeykudinkin merged 3 commits intoray-project:masterfrom Dec 19, 2025
Merged
[data] Set default actor pool scale up threshold to 1.75#59512alexeykudinkin merged 3 commits intoray-project:masterfrom
alexeykudinkin merged 3 commits intoray-project:masterfrom
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Signed-off-by: iamjustinhsu <jhsu@anyscale.com>
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This pull request adjusts the default actor pool upscaling threshold from 2.0 to 1.75. As detailed in the description, this allows the actor pool to scale up before it is fully saturated, which should improve the responsiveness of autoscaling and help prevent performance bottlenecks. The change is a simple modification of a default value and is implemented correctly. The surrounding logic, including validation checks for this threshold, appears to handle this new default value appropriately. The change looks good.
alexeykudinkin
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Dec 17, 2025
Yicheng-Lu-llll
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Dec 22, 2025
…#59512) ## Description Currently, we actor pool util is calculated as the following: - `max_tasks_in_flight / (num_actors_running * max_concurrency)` Since `max_tasks_in_flight_per_actor = 2 * max_concurrency` and because The default value for scaling up `RAY_DATA_DEFAULT_ACTOR_POOL_UTIL_UPSCALING_THRESHOLD` is 2.0, the only way for the actor pool util to reach 200% is if the actor pool is fully saturated. ## Related issues None ## Additional information None --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com>
lee1258561
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this pull request
Feb 3, 2026
…#59512) ## Description Currently, we actor pool util is calculated as the following: - `max_tasks_in_flight / (num_actors_running * max_concurrency)` Since `max_tasks_in_flight_per_actor = 2 * max_concurrency` and because The default value for scaling up `RAY_DATA_DEFAULT_ACTOR_POOL_UTIL_UPSCALING_THRESHOLD` is 2.0, the only way for the actor pool util to reach 200% is if the actor pool is fully saturated. ## Related issues None ## Additional information None --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com>
peterxcli
pushed a commit
to peterxcli/ray
that referenced
this pull request
Feb 25, 2026
…#59512) ## Description Currently, we actor pool util is calculated as the following: - `max_tasks_in_flight / (num_actors_running * max_concurrency)` Since `max_tasks_in_flight_per_actor = 2 * max_concurrency` and because The default value for scaling up `RAY_DATA_DEFAULT_ACTOR_POOL_UTIL_UPSCALING_THRESHOLD` is 2.0, the only way for the actor pool util to reach 200% is if the actor pool is fully saturated. ## Related issues None ## Additional information None --------- Signed-off-by: iamjustinhsu <jhsu@anyscale.com> Signed-off-by: peterxcli <peterxcli@gmail.com>
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Description
Currently, we actor pool util is calculated as the following:
max_tasks_in_flight / (num_actors_running * max_concurrency)Since
max_tasks_in_flight_per_actor = 2 * max_concurrencyand because The default value for scaling upRAY_DATA_DEFAULT_ACTOR_POOL_UTIL_UPSCALING_THRESHOLDis 2.0, the only way for the actor pool util to reach 200% is if the actor pool is fully saturated.Related issues
None
Additional information
None