Details
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Bug
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Resolution: Fixed
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Critical
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7.1.0
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1
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Yes
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KV 2021-Nov, KV 2021-Dec, KV 2022-Jan, KV 2022-Feb
Description
Repetition of the the same test as in MB-49134, this time on a toy-build that contains stats improvements by MB-48587.
Run: http://perf.jenkins.couchbase.com/job/oceanus/7373/
Build: 7.1.0-1670 + MB-48587
The test is a simple bulk load (via restore) of 320 Million items on a 2-KVNode cluster. 1 Bucket, 1 Replica.
We have a success from the test PoV, as all the items are successfully stored and replicated.
The problem is the checkpoints_overhead_estimate_replica stat (yellow line) that shows a constantly increasing asymptotic trend.
Charts show that the checkpoints_overhead_estimate_index_replica (dark-blue line) is what determines that trend.
Note
The above ran with the default checkpoint_memory_ratio=30%.
Interestingly enough, lowering the CMQuota (eg, 10%, http://perf.jenkins.couchbase.com/job/oceanus/7372/parameters) shrinks all the other mem-usage stats too, so the pattern stays the same.