Crate microsandbox_metrics 

Shared-memory live metrics registry for microsandbox.

Replaces continuous sandbox_metric inserts into the catalog SQLite database with a single POSIX shared-memory region. Every running sandbox owns one fixed slot; readers scan the region to produce typed metrics responses without per-sandbox RPC or per-sample writes.

Structs

ActivateSlot

Caller-supplied data used to transition a reservation to active.

LiveMetric

Coherent live sample read from a single registry slot.

MetricsRegistry

Shared-memory registry.

MetricsSlotWriter

Per-slot writer handle held by the runtime process.

ReserveSlot

Caller-supplied data used to reserve a slot.

SampleWrite

Sample bytes to write into a slot.

SandboxMetricSnapshot

Metrics plus shared-memory identity metadata for one active sandbox slot.

SandboxMetrics

Point-in-time metrics for a running sandbox (no identity fields).

SlotReservation

Reservation token returned by MetricsRegistry::reserve.

Enums

LiveMetricState

Slot state observed when a LiveMetric was read.

MetricsError

Errors produced by the metrics registry.

ReleaseMode

Mode passed to MetricsRegistry::release.

Constants

REGISTRY_ABI_VERSION

Maximum bytes reserved for a sandbox name inside a fixed metrics slot. Current shared-memory registry ABI version.

SLOT_NAME_BYTES

Maximum bytes reserved for a sandbox name inside a fixed metrics slot. Maximum bytes reserved for the sandbox name inside a slot.

Functions

default_capacity

Default capacity used by the host launcher when creating a registry.

Type Aliases

MetricsResult

Result alias for metrics operations.