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PoolConfig

Struct PoolConfig 

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pub struct PoolConfig {
Show 13 fields pub max_size: u32, pub min_idle: u32, pub acquire_timeout: Duration, pub idle_timeout: Duration, pub max_lifetime: Duration, pub connection_timeout: Duration, pub tls: Option<TlsConfig>, pub query_timeout: Option<Duration>, pub max_rows: Option<usize>, pub memory_limit: Option<usize>, pub on_event: Option<Arc<dyn Fn(PoolEvent) + Send + Sync>>, pub test_before_acquire: bool, pub prewarm: bool,
}

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§max_size: u32§min_idle: u32§acquire_timeout: Duration§idle_timeout: Duration§max_lifetime: Duration§connection_timeout: Duration§tls: Option<TlsConfig>

TLS 配置

§query_timeout: Option<Duration>

SQL 执行超时(默认 30 秒)

§max_rows: Option<usize>

单次查询最大返回行数(默认无限制)

§memory_limit: Option<usize>

内存使用上限(字节,默认无限制)

§on_event: Option<Arc<dyn Fn(PoolEvent) + Send + Sync>>

连接池事件回调

§test_before_acquire: bool

acquire 时是否执行 ping 验证连接存活(默认 false)。

开启后,从空闲队列取出的连接会先执行 ping() 验证网络连通性, ping 失败的连接会被丢弃并重新 acquire。

注意:开启此选项会增加每次 acquire 的延迟(一次额外的网络 RTT)。 适用于 DB 可能重启且不能容忍首次查询失败的场景。

§prewarm: bool

连接池预热:启用后池创建时立即建立 min_idle 个连接(默认 false)。

预热后首次 acquire 延迟 < 10ms(对比冷启动 < 100ms)。

§示例

let config = PoolConfig::default().with_prewarm(true);
let pool = Pool::new(config, factory).await?;
// 此时池中已有 min_idle 个连接

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impl PoolConfig

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pub fn validate(&self) -> Result<(), PoolError>

校验配置合法性

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pub fn with_prewarm(self, prewarm: bool) -> PoolConfig

设置预热标志(链式调用)

Trait Implementations§

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impl Clone for PoolConfig

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fn clone(&self) -> PoolConfig

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Default for PoolConfig

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fn default() -> PoolConfig

Returns the “default value” for a type. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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