Enum MemoryPressureLevel 

pub enum MemoryPressureLevel {
    Low,
    Medium,
    High,
    Critical,
}

Severity level of memory pressure in a buffer pool.

Level is determined by the fraction of buffers that are currently in use:

Level	In-use fraction
Low	< medium watermark
Medium	medium ≤ f < high
High	high ≤ f < critical
Critical	≥ critical watermark

Variants

Low

Less than the medium watermark is in use — pool is healthy.

Medium

Between medium and high watermarks.

High

Between high and critical watermarks.

Critical

At or above the critical watermark — pool nearly exhausted.

Trait Implementations

impl Clone for MemoryPressureLevel

fn clone(&self) -> MemoryPressureLevel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryPressureLevel

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

Formats the value using the given formatter.

impl Default for MemoryPressureLevel

fn default() -> Self

Returns the “default value” for a type.

impl Hash for MemoryPressureLevel

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for MemoryPressureLevel

fn cmp(&self, other: &MemoryPressureLevel) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for MemoryPressureLevel

fn eq(&self, other: &MemoryPressureLevel) -> 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 PartialOrd for MemoryPressureLevel

fn partial_cmp(&self, other: &MemoryPressureLevel) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for MemoryPressureLevel

impl Eq for MemoryPressureLevel

impl StructuralPartialEq for MemoryPressureLevel