Struct CheckpointProbe 

pub struct CheckpointProbe {
    pub busy: i64,
    pub log_frames: i64,
    pub checkpointed_frames: i64,
}

Raw PRAGMA wal_checkpoint(PASSIVE) return row.

SQLite returns three columns: busy (1 when the checkpoint could not obtain the checkpoint lock or read the WAL-index header), log (frames currently in the WAL), and checkpointed (frames moved into the database by THIS call). The one-row backfill gap is log - checkpointed; that difference alone does not establish a reader pin.

Fields

busy: i64

log_frames: i64

checkpointed_frames: i64

Implementations

impl CheckpointProbe

pub fn backfill_gap_frames(&self) -> i64

Frames still awaiting backfill in this row. Negative frame counts (an in-memory or non-WAL database reports -1) return 0. Even when busy, populated frame counts describe only a gap, never a reader pin.

Trait Implementations

impl Clone for CheckpointProbe

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CheckpointProbe

impl Debug for CheckpointProbe

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

Formats the value using the given formatter.

impl Eq for CheckpointProbe

impl PartialEq for CheckpointProbe

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for CheckpointProbe

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 CheckpointProbe