Struct MemoryPressureProbe 

pub struct MemoryPressureProbe {
    pub high_watermark: f64,
    pub low_watermark: f64,
}

Lightweight memory pressure monitor.

Call is_high() before eviction decisions to determine whether to be aggressive. If the platform is unsupported, is_high() always returns false, meaning the pager relies entirely on the byte-budget to drive eviction.

Defaults

• high_watermark = 0.90 — trigger aggressive eviction above 90% RSS.
• low_watermark = 0.75 — stop evicting once below 75% RSS.

Fields

high_watermark: f64

RSS / total-RAM fraction above which pressure is considered high.

low_watermark: f64

RSS / total-RAM fraction below which pressure is considered low (used by callers implementing hysteresis).

Implementations

impl MemoryPressureProbe

pub fn new(high_watermark: f64, low_watermark: f64) -> Self

Create a new probe with the given watermarks.

Panics (debug)

Panics in debug builds if low_watermark >= high_watermark.

pub fn is_high(&self) -> bool

Returns true if the current RSS is at or above the high watermark.

Returns false if the pressure level is unknown (unsupported platform).

pub fn is_low(&self) -> bool

Returns true if the current RSS is below the low watermark.

Useful for hysteresis: stop evicting once is_low() returns true.

Returns true if the pressure level is unknown (conservatively assume safe).

Trait Implementations

impl Clone for MemoryPressureProbe

fn clone(&self) -> MemoryPressureProbe

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryPressureProbe

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

Formats the value using the given formatter.

impl Default for MemoryPressureProbe

fn default() -> Self

Returns the “default value” for a type.