Details
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Bug
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Resolution: Won't Fix
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Critical
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Cheshire-Cat
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Untriaged
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1
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Unknown
Description
When running n1ql covering array query, CPU usage is much higher.
http://perf.jenkins.couchbase.com/job/aether/191
Looking at CPU profile, a lot of time is being spent on mcall. There are 2 possibilities:
1) IO is saturated and log cleaning is falling behind. Writer is stalled due to tryThrottleForLSS(). This function can invoke mcall.
2) There is a lot of goroutines contending for the write buffer.