Struct PoolConfig 

pub struct PoolConfig {
    pub max_connections: usize,
    pub min_connections: usize,
    pub connection_timeout: Option<Duration>,
    pub idle_timeout: Option<Duration>,
    pub max_lifetime: Option<Duration>,
    pub statement_cache_size: usize,
}

Configuration for the connection pool.

Fields

max_connections: usize

Maximum number of connections in the pool.

min_connections: usize

Minimum number of connections to pre-establish and keep alive.

deadpool exposes no minimum-size knob, so these are established by a best-effort background warmup when the pool is created; the released connections are then retained by the pool.

connection_timeout: Option<Duration>

Maximum time to wait for a connection.

idle_timeout: Option<Duration>

Timeout for recycling a connection when it is returned to the pool.

Mapped to deadpool’s recycle_timeout, which bounds the recycle check performed on connection return — it is not an idle-reaping timeout. deadpool-postgres 0.14 exposes no true idle timeout, so connections are not closed after a fixed idle period.

max_lifetime: Option<Duration>

Maximum lifetime of a connection.

Not yet applied: deadpool-postgres 0.14 exposes no connection lifetime knob, so this value is stored but currently unused.

statement_cache_size: usize

Number of SQL strings tracked for prepared-statement cache metrics.

PreparedStatementCache records only which SQL strings have been seen (hit/miss tracing); actual statement caching is per-connection inside tokio-postgres and is not bounded by this value.

Trait Implementations

impl Clone for PoolConfig

fn clone(&self) -> PoolConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PoolConfig

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

Formats the value using the given formatter.

impl Default for PoolConfig

fn default() -> Self

Returns the “default value” for a type.