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Type: Task
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Resolution: Unresolved
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Priority: Major - P3
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None
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Affects Version/s: None
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Component/s: None
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Labels:
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StorEng - Refinement Pipeline
After the CppSuite tests were moved to a new everygreen variant and a subset were made more stressful (WT-8640), the hs_cleanup test's cc_pages_removed statistic is extremely varied at the end of test runs.
The latest build shows this clearly in the performance plot generated from the test:
We can see that prior to the commit identified by the arrow the statistic was noisy to begin with but after WT-8640 the variance between commits has jumped significantly.
While its unclear if the stat should be generally higher or lower than the commits prior to WT-8640 it is interesting that it shows significant variance between commits and the reason for that should be investigated and understood.
Scope:
- Investigate why the statistic is so varied between runs
- Create follow up ticket to fix the behaviour if possible