Enum PermitGranularity 

pub enum PermitGranularity {
    Kilobyte,
    Megabyte,
}

Memory permit granularity for different use cases.

Variants

Kilobyte

1 KB per permit

Use for:

• HTTP/gRPC request limiting (small, high-concurrency operations)
• Small batch operations
• Scenarios requiring fine-grained fairness

Megabyte

1 MB per permit (default)

Use for:

• Query execution memory management
• Compaction memory control
• Large, long-running operations

Implementations

impl PermitGranularity

pub const fn bytes(self) -> u64

Returns the number of bytes per permit.

pub const fn as_str(self) -> &'static str

Returns a human-readable string representation.

pub fn bytes_to_permits(self, bytes: u64) -> u32

Converts bytes to permits based on this granularity.

Rounds up to ensure the requested bytes are fully covered. Clamped to Semaphore::MAX_PERMITS.

pub fn permits_to_bytes(self, permits: u32) -> u64

Converts permits to bytes based on this granularity.

Trait Implementations

impl Clone for PermitGranularity

fn clone(&self) -> PermitGranularity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PermitGranularity

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

Formats the value using the given formatter.

impl Default for PermitGranularity

fn default() -> PermitGranularity

Returns the “default value” for a type.

impl Display for PermitGranularity

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

Formats the value using the given formatter.

impl PartialEq for PermitGranularity

fn eq(&self, other: &PermitGranularity) -> 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 Copy for PermitGranularity

impl Eq for PermitGranularity

impl StructuralPartialEq for PermitGranularity