Struct TelemetrySnapshot 

pub struct TelemetrySnapshot {
    pub operators: Vec<OperatorSnapshot>,
    pub tiers: TierSnapshot,
    pub spill: SpillSnapshot,
    pub plan: Vec<PlanNodeSummary>,
    pub capacity: TierCapacity,
}

Everything the dashboard renders, captured at one instant.

Fields

operators: Vec<OperatorSnapshot>

Per-operator counters, in registration order.

tiers: TierSnapshot

Memory tier gauges.

spill: SpillSnapshot

Spill counters.

plan: Vec<PlanNodeSummary>

The displayed plan.

capacity: TierCapacity

Tier capacities, and whether the query path fills the tiers at all.

Implementations

impl TelemetrySnapshot

pub fn to_prometheus(&self) -> String

Renders the snapshot as Prometheus text (text/plain; version=0.0.4).

Written by hand rather than through a metrics crate: the counters are already the right shape, the output is a dozen lines, and a scrape endpoint is not worth a dependency tree in a query engine. Operator counters carry operator and backend labels; the tier gauges and spill counters carry none.

Label values are escaped per the exposition format, because an operator name is GpuFilterExec today and a user-supplied string the moment someone adds one.

Trait Implementations

impl Clone for TelemetrySnapshot

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TelemetrySnapshot

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

Formats the value using the given formatter.

impl Default for TelemetrySnapshot

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TelemetrySnapshot

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for TelemetrySnapshot

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for TelemetrySnapshot

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TelemetrySnapshot