Struct BgWriterConfig 

pub struct BgWriterConfig {
    pub delay: Duration,
    pub max_pages_per_round: usize,
    pub lru_multiplier: f64,
    pub max_dirty_fraction: f64,
}

Configuration for the background writer task. All fields have PG-equivalent defaults; production code can override via BgWriterConfig::with_* builders.

Fields

delay: Duration

Sleep between scan rounds.

max_pages_per_round: usize

Maximum dirty pages to flush per round. Soft limit — the writer stops at the first round that hits it.

lru_multiplier: f64

LRU adaptive multiplier. The writer estimates how many fresh buffers will be needed in the next round based on recent allocation rate, then flushes multiplier × estimate. Higher values flush more aggressively; lower values save I/O at the cost of query-side stall risk.

max_dirty_fraction: f64

Soft cap on the dirty-page percentage. When the buffer pool’s dirty fraction exceeds this, the writer scans every round regardless of delay.

Trait Implementations

impl Clone for BgWriterConfig

fn clone(&self) -> BgWriterConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BgWriterConfig

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

Formats the value using the given formatter.

impl Default for BgWriterConfig

fn default() -> BgWriterConfig

Returns the “default value” for a type.

impl Copy for BgWriterConfig