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Does CPU utilization from iowait increase only during the initial period of StorageGRID node decommissioning?

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Answer

No, CPU utilization from iowait doesn't increase only during the initial period of StorageGRID node decommissioning. It remains high throughout the entire process.

Additional Information

 
CPU utilization from iowait of this specific node increases up to 5 times (from 10% to 50%) during decommissioning, indicating that the disk system is the bottleneck.
sum by (mode)(irate(node_cpu_seconds_total{instance="issued storage node name",mode!~'idle|guest|nice'}[5m])) * 100 / count by (mode)(node_cpu_seconds_total{instance="issued storage node name",mode!~'idle|guest|nice'})
ServiceUnavailable failure
 
iowait.png

 

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