stable_latencyConsistent performance across executions
Low-variance execution time indicates well-optimized query execution and stable system conditions.
Using stable latency as a baseline
typescript
// stable_latency fires when variance is low across recent executions.
// Use it to establish performance baselines and detect regressions.
const monitor = createMonitor({
emitPositiveSignals: true,
exporter: (event) => {
if (event.signals.includes('stable_latency')) {
// Record the p50 as your baseline
metrics.gauge('db.query.baseline_ms', event.durationMs, {
model: event.model,
operation: event.operation,
});
}
if (event.signals.includes('high_variance_latency')) {
// Alert when the same query stops being stable
alertOncall('Latency regression detected', {
model: event.model,
durationMs: event.durationMs,
});
}
},
});