2021-04-07: CI runner apdex drop causing delays in pipeline processing
Current Status
More information will be added as we investigate the issue.
Summary for CMOC notice / Exec summary:
- Customer Impact: Delays in job processing
- Customer Impact Duration: 11:25 - 16:00 4.5h
- Current state: See
Incident::<state>
label - Root cause:
Analyze notes
has executed for a long time11:26-14:05
which caused a large number of dead tuples which affected all jobs processed on the Shared Runners. The cause forAnalyze notes
taking that long is currently under active investigation in the incident room as of 14:47.
We are seeing an apdex drop for the CI runner service starting at 12:00 UTC
Timeline
View recent production deployment and configuration events (internal only)
All times UTC.
2021-04-07
-
12:35
- @jarv declares incident in Slack.
Corrective Actions
Corrective actions should be put here as soon as an incident is mitigated, ensure that all corrective actions mentioned in the notes below are included.
- optimise job queueing gitlab-org/gitlab#322766 (closed).
- postgresql 12 upgrade &440 (closed)
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Incident Review
Summary
- Service(s) affected:
- Team attribution:
- Time to detection:
- Minutes downtime or degradation:
Metrics
Customer Impact
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Who was impacted by this incident? (i.e. external customers, internal customers)
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What was the customer experience during the incident? (i.e. preventing them from doing X, incorrect display of Y, ...)
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How many customers were affected?
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If a precise customer impact number is unknown, what is the estimated impact (number and ratio of failed requests, amount of traffic drop, ...)?
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What were the root causes?
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Incident Response Analysis
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How was the incident detected?
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How could detection time be improved?
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How was the root cause diagnosed?
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How could time to diagnosis be improved?
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How did we reach the point where we knew how to mitigate the impact?
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How could time to mitigation be improved?
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What went well?
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Post Incident Analysis
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Did we have other events in the past with the same root cause?
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Do we have existing backlog items that would've prevented or greatly reduced the impact of this incident?
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Was this incident triggered by a change (deployment of code or change to infrastructure)? If yes, link the issue.
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Lessons Learned
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Guidelines
Resources
- If the Situation Zoom room was utilised, recording will be automatically uploaded to Incident room Google Drive folder (private)