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Type: Bug
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Resolution: Done
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Priority: Major - P3
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None
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Affects Version/s: 3.4.18
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Component/s: WiredTiger
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None
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ALL
Recently we have found that the primary is hitting 95% cache usage and query responses become very slow.
Nothing material is known to have changed (ie data/size/workload etc).
I have diagnostics saved from the time of the event and can provide other details as requested.
Following a step down the cache recovered to 80% within a few minutes.