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prefect.server.models.concurrency_limits_v2

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Functions

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active_slots_after_decay 

active_slots_after_decay(db: PrefectDBInterface) -> ColumnElement[float]

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denied_slots_after_decay 

denied_slots_after_decay(db: PrefectDBInterface) -> ColumnElement[float]
Calculate denied_slots after applying decay. Denied slots decay at a rate of slot_decay_per_second per second if it’s greater than 0 (rate limits), otherwise for concurrency limits it decays at a rate based on clamped avg_slot_occupancy_seconds. The clamping matches the retry-after calculation to prevent denied_slots from accumulating when clients retry faster than the unclamped decay rate.

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create_concurrency_limit 

create_concurrency_limit(db: PrefectDBInterface, session: AsyncSession, concurrency_limit: Union[schemas.actions.ConcurrencyLimitV2Create, schemas.core.ConcurrencyLimitV2]) -> orm_models.ConcurrencyLimitV2

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read_concurrency_limit 

read_concurrency_limit(db: PrefectDBInterface, session: AsyncSession, concurrency_limit_id: Optional[UUID] = None, name: Optional[str] = None) -> Union[orm_models.ConcurrencyLimitV2, None]

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read_all_concurrency_limits 

read_all_concurrency_limits(db: PrefectDBInterface, session: AsyncSession, limit: int, offset: int) -> Sequence[orm_models.ConcurrencyLimitV2]

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update_concurrency_limit 

update_concurrency_limit(db: PrefectDBInterface, session: AsyncSession, concurrency_limit: schemas.actions.ConcurrencyLimitV2Update, concurrency_limit_id: Optional[UUID] = None, name: Optional[str] = None) -> bool

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delete_concurrency_limit 

delete_concurrency_limit(db: PrefectDBInterface, session: AsyncSession, concurrency_limit_id: Optional[UUID] = None, name: Optional[str] = None) -> bool

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bulk_read_concurrency_limits 

bulk_read_concurrency_limits(db: PrefectDBInterface, session: AsyncSession, names: List[str]) -> List[orm_models.ConcurrencyLimitV2]

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bulk_increment_active_slots 

bulk_increment_active_slots(db: PrefectDBInterface, session: AsyncSession, concurrency_limit_ids: List[UUID], slots: int) -> bool

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bulk_decrement_active_slots 

bulk_decrement_active_slots(db: PrefectDBInterface, session: AsyncSession, concurrency_limit_ids: List[UUID], slots: int, occupancy_seconds: Optional[float] = None) -> bool

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bulk_update_denied_slots 

bulk_update_denied_slots(db: PrefectDBInterface, session: AsyncSession, concurrency_limit_ids: List[UUID], slots: int) -> bool