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feat: Calculate the age of a WAL segment #13637

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merged 1 commit into from
Jul 24, 2024

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grobinson-grafana
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@grobinson-grafana grobinson-grafana commented Jul 24, 2024

What this PR does / why we need it:

This pull request updates the WAL Manager to calculate the age of each segment. The age is the time between the first append and when the segment is moved to the pending list.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Checklist

  • Reviewed the CONTRIBUTING.md guide (required)
  • Documentation added
  • Tests updated
  • Title matches the required conventional commits format, see here
    • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
  • Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
  • For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
  • If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

This commit updates the WAL Manager to calculate the age of each
segment. The age is the time between the first append and when the
segment is moved to the pending list.
@grobinson-grafana grobinson-grafana requested a review from a team as a code owner July 24, 2024 09:35
@grobinson-grafana grobinson-grafana self-assigned this Jul 24, 2024
m.metrics.NumPending.Inc()
m.available.Remove(el)
m.metrics.NumAvailable.Dec()
m.firstAppend = time.Time{}
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No longer needed as firstAppend is a field of segment, not Manager.

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@cyriltovena cyriltovena left a comment

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LGTM

it should be added as a metric !

@grobinson-grafana
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LGTM

it should be added as a metric !

Yes! Planning to do that in a follow up PR 👍

@grobinson-grafana grobinson-grafana merged commit 4abb5a4 into main Jul 24, 2024
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@grobinson-grafana grobinson-grafana deleted the grobinson/calculate-age-of-segment branch July 24, 2024 10:20
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2 participants