Struct Metrics 

pub struct Metrics {
    pub live: u64,
    pub idle: u64,
    pub parked: u64,
    pub created: u64,
    pub closed: u64,
    pub acquires: u64,
    pub waits: u64,
    pub timeouts: u64,
    pub poisoned: u64,
    pub recycle_failures: u64,
    pub unparked: u64,
}

A point-in-time snapshot of pool activity, from Pool::metrics.

Gauges (live, idle, parked) are summed across threads without a lock, so they can be momentarily inconsistent with each other. Counters are monotonic.

Fields

live: u64

Connections currently owned by a shard, idle or checked out.

idle: u64

Connections sitting in a shard free list.

parked: u64

Connections sitting in the cross-thread reservoir.

created: u64

Connections opened since the pool was created.

closed: u64

Connections closed since the pool was created.

acquires: u64

Successful checkouts.

waits: u64

Checkouts that had to wait for a connection to come back.

timeouts: u64

Checkouts that gave up at the acquire timeout.

poisoned: u64

Connections discarded because a checkout was cancelled mid-operation.

recycle_failures: u64

Connections discarded because recycle rejected them.

unparked: u64

Connections taken from the reservoir by a thread that did not open them.

Trait Implementations

impl Clone for Metrics

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 Metrics

impl Debug for Metrics

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

Formats the value using the given formatter.

impl Default for Metrics

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Metrics

impl PartialEq for Metrics

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Metrics