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feat: limit the amount of results coming from Prometheus (#2776)

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## About the changes
To avoid showing too much data in the traffic screen, limit the number
of results to `topk`.

## Discussion points
Top 10 is a rule of thumb, but maybe we could do top 25. Until we gather
more data, I believe this should be good enough
This commit is contained in:
Gastón Fournier 2023-01-04 11:00:04 +01:00 committed by GitHub
parent 111dddd746
commit bf77182ca7
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2 changed files with 3 additions and 3 deletions
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2
frontend/src/component/admin/network/NetworkTraffic/NetworkTraffic.tsx
View File

@ -87,7 +87,7 @@ const createInstanceChartOptions = (
},
},
title: {
text: 'Requests per second in the last 6 hours',
text: 'Top 10 requests per second in the last 6 hours',
position: 'top',
align: 'start',
display: true,

4
src/lib/services/client-metrics/instance-service.ts
View File

@ -224,7 +224,7 @@ export default class ClientInstanceService {
return (d.getTime() - d.getMilliseconds()) / 1000;
}
async getRPS(hoursToQuery: number): Promise<any> {
async getRPS(hoursToQuery: number, limit = 10): Promise<any> {
if (!this.prometheusApi) {
this.logger.warn('Prometheus not configured');
return;
@ -233,7 +233,7 @@ export default class ClientInstanceService {
const basePath = this.serverOption.baseUriPath.replace(/\/$/, '');
const pathQuery = `${basePath}/api/.*`;
const step = '5m';
const rpsQuery = `irate (http_request_duration_milliseconds_count{path=~"${pathQuery}"} [${step}])`;
const rpsQuery = `topk(${limit}, irate (http_request_duration_milliseconds_count{path=~"${pathQuery}"} [${step}]))`;
const query = `sum by(appName, endpoint) (label_replace(${rpsQuery}, "endpoint", "$1", "path", "${basePath}(/api/(?:client/)?[^/\*]*).*"))`;
const end = new Date();
const start = new Date();