Enum CheckpointSeverityRung 

pub enum CheckpointSeverityRung {
    Info,
    Warn,
    Alarm,
}

ADR-091 graduated severity rung for sustained WAL pressure.

Alarm is never produced by CheckpointSeverityState::observe_wal_pages — it labels the existing TRUNCATE-escalation tier (maybe_truncate), which is gated on its own threshold/interval state, not on this ladder. It exists here so callers and tests can name all three rungs uniformly.

Variants

Info

First observed tick crossing warn_pages after a below-warn tick.

Warn

warn_sustained_cycles consecutive observed ticks at/above warn_pages; edge-triggered once per elevation episode.

Alarm

The TRUNCATE-escalation tier (checkpoint_high_water_pages and above); never emitted by observe_wal_pages.

Trait Implementations

impl Clone for CheckpointSeverityRung

fn clone(&self) -> CheckpointSeverityRung

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CheckpointSeverityRung

impl Debug for CheckpointSeverityRung

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

Formats the value using the given formatter.

impl Eq for CheckpointSeverityRung

impl PartialEq for CheckpointSeverityRung

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CheckpointSeverityRung