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Merge branch 'db-query-time-prom-metric' into 'main'

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basic (and incredibly stupid but potentially genius) db_query_time histogram

See merge request soapbox-pub/ditto!400
This commit is contained in:
Alex Gleason 2024-06-27 13:53:17 +00:00
commit eba0605e32
2 changed files with 9 additions and 1 deletions
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3
src/db/KyselyLogger.ts
View file

@ -1,5 +1,6 @@
import { Stickynotes } from '@soapbox/stickynotes'; import { Stickynotes } from '@soapbox/stickynotes';
import { Logger } from 'kysely'; import { Logger } from 'kysely';
import { dbQueryTimeHistogram } from '@/metrics.ts';
/** Log the SQL for queries. */ /** Log the SQL for queries. */
export const KyselyLogger: Logger = (event) => { export const KyselyLogger: Logger = (event) => {
@ -9,6 +10,8 @@ export const KyselyLogger: Logger = (event) => {
const { query, queryDurationMillis } = event; const { query, queryDurationMillis } = event;
const { sql, parameters } = query; const { sql, parameters } = query;
dbQueryTimeHistogram.observe(queryDurationMillis);
console.debug( console.debug(
sql, sql,
JSON.stringify(parameters), JSON.stringify(parameters),

7
src/metrics.ts
View file

@ -1,4 +1,4 @@
import { Counter, Gauge } from 'prom-client'; import { Counter, Gauge, Histogram } from 'prom-client';
export const httpRequestCounter = new Counter({ export const httpRequestCounter = new Counter({
name: 'http_requests_total', name: 'http_requests_total',
@ -67,3 +67,8 @@ export const dbAvailableConnectionsGauge = new Gauge({
name: 'db_available_connections', name: 'db_available_connections',
help: 'Number of available connections in the database pool', help: 'Number of available connections in the database pool',
}); });
export const dbQueryTimeHistogram = new Histogram({
name: 'db_query_duration_seconds',
help: 'Duration of database queries',
});