47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
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// Prometheus metrics. Reusable counters/histograms for the API + cache.
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import { Counter, collectDefaultMetrics, Gauge, Histogram, Registry } from 'prom-client';
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export const registry = new Registry();
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collectDefaultMetrics({ register: registry });
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export const httpRequests = new Counter({
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name: 'http_requests_total',
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help: 'Total HTTP requests',
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labelNames: ['method', 'route', 'status'],
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registers: [registry],
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});
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export const httpDuration = new Histogram({
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name: 'http_request_duration_seconds',
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help: 'HTTP request duration in seconds',
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labelNames: ['method', 'route', 'status'],
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buckets: [0.001, 0.005, 0.01, 0.05, 0.1, 0.5, 1, 2, 5],
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registers: [registry],
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});
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export const searchCacheHits = new Counter({
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name: 'search_cache_hits_total',
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help: 'Number of search results served from the LRU cache',
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registers: [registry],
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});
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export const searchCacheMisses = new Counter({
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name: 'search_cache_misses_total',
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help: 'Number of search requests that bypassed the cache',
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registers: [registry],
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});
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export const imdbRatingsCount = new Gauge({
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name: 'imdb_ratings_total',
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help: 'Number of IMDb ratings currently loaded in memory',
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registers: [registry],
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});
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export const searchWorkers = new Gauge({
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name: 'search_workers',
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help: 'Number of active search workers per type',
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labelNames: ['type'],
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registers: [registry],
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});
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