Struct PoolMetrics 

#[non_exhaustive]
pub struct PoolMetrics {
    pub total: usize,
    pub idle: usize,
    pub in_use: usize,
    pub waiters: usize,
    pub total_checkouts: u64,
    pub total_created: u64,
    pub total_destroyed: u64,
    pub total_timeouts: u64,
}

Snapshot of pool metrics.

Marked #[non_exhaustive] so new counters can be added without breaking downstream pattern matches or struct construction.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

total: usize

Total number of connections currently held by the pool (idle + in-use).

idle: usize

Number of connections currently parked on the idle stack and ready to hand out.

in_use: usize

Number of connections currently checked out via PoolGuard.

waiters: usize

Number of tasks currently parked waiting for a connection.

total_checkouts: u64

Cumulative count of successful checkouts since the pool was created.

total_created: u64

Cumulative count of new connections opened by the pool.

total_destroyed: u64

Cumulative count of connections destroyed (closed, evicted, or failed validation).

total_timeouts: u64

Cumulative count of get() calls that timed out before acquiring a connection.

Trait Implementations

impl Clone for PoolMetrics

fn clone(&self) -> PoolMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PoolMetrics

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

Formats the value using the given formatter.