Struct LimitedPriorityLevelConfiguration

pub struct LimitedPriorityLevelConfiguration {
    pub borrowing_limit_percent: Option<i32>,
    pub lendable_percent: Option<i32>,
    pub limit_response: Option<LimitResponse>,
    pub nominal_concurrency_shares: Option<i32>,
}

LimitedPriorityLevelConfiguration specifies how to handle requests that are subject to limits. It addresses two issues:

• How are requests for this priority level limited?
• What should be done with requests that exceed the limit?

Fields

borrowing_limit_percent: Option<i32>

borrowingLimitPercent, if present, configures a limit on how many seats this priority level can borrow from other priority levels. The limit is known as this level’s BorrowingConcurrencyLimit (BorrowingCL) and is a limit on the total number of seats that this level may borrow at any one time. This field holds the ratio of that limit to the level’s nominal concurrency limit. When this field is non-nil, it must hold a non-negative integer and the limit is calculated as follows.

BorrowingCL(i) = round( NominalCL(i) * borrowingLimitPercent(i)/100.0 )

The value of this field can be more than 100, implying that this priority level can borrow a number of seats that is greater than its own nominal concurrency limit (NominalCL). When this field is left nil, the limit is effectively infinite.

lendable_percent: Option<i32>

lendablePercent prescribes the fraction of the level’s NominalCL that can be borrowed by other priority levels. The value of this field must be between 0 and 100, inclusive, and it defaults to 0. The number of seats that other levels can borrow from this level, known as this level’s LendableConcurrencyLimit (LendableCL), is defined as follows.

LendableCL(i) = round( NominalCL(i) * lendablePercent(i)/100.0 )

limit_response: Option<LimitResponse>

limitResponse indicates what to do with requests that can not be executed right now

nominal_concurrency_shares: Option<i32>

nominalConcurrencyShares (NCS) contributes to the computation of the NominalConcurrencyLimit (NominalCL) of this level. This is the number of execution seats available at this priority level. This is used both for requests dispatched from this priority level as well as requests dispatched from other priority levels borrowing seats from this level. The server’s concurrency limit (ServerCL) is divided among the Limited priority levels in proportion to their NCS values:

NominalCL(i) = ceil( ServerCL * NCS(i) / sum_ncs ) sum_ncs = sum[priority level k] NCS(k)

Bigger numbers mean a larger nominal concurrency limit, at the expense of every other priority level.

If not specified, this field defaults to a value of 30.

Setting this field to zero supports the construction of a “jail” for this priority level that is used to hold some request(s)

Trait Implementations

impl Clone for LimitedPriorityLevelConfiguration

fn clone(&self) -> LimitedPriorityLevelConfiguration

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LimitedPriorityLevelConfiguration

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl DeepMerge for LimitedPriorityLevelConfiguration

fn merge_from(&mut self, other: Self)

Merge other into self.

impl Default for LimitedPriorityLevelConfiguration

fn default() -> LimitedPriorityLevelConfiguration

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for LimitedPriorityLevelConfiguration

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for LimitedPriorityLevelConfiguration

fn eq(&self, other: &LimitedPriorityLevelConfiguration) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for LimitedPriorityLevelConfiguration

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LimitedPriorityLevelConfiguration