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location China
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visits member for 2 years, 1 month
seen Jan 6 '13 at 6:08

Sep
11
comment Why load increase ,ssd iops increase but cpu iowait decrease?
<br/>The cpu model is intel xeon(r) L5630. Someone says cpu is usually be the bottleneck when using SSD. I cann't get this conclusion by analyzing.<br/> I appreciate someone show how to analyze this case or some case like this.
Sep
11
comment Why load increase ,ssd iops increase but cpu iowait decrease?
Thank you for your patient and your explanation. I find much illumination from your analyze. <br> Yes the system is working near it's processing capacity. Of course the bottleneck is not disk , because its iops is far less than its capacity. The memory is 48G,
Sep
11
comment Why load increase ,ssd iops increase but cpu iowait decrease?
First, thank you for your reply. I agree your opinion about IOWAIT. Then I can describe it in another way : when disk requests descreases, the cpu spend more time on the disk; when disk requests increases, the cpu spend less time on the disk. I feel confused again. There should be another explanation for this.
Sep
10
asked Why load increase ,ssd iops increase but cpu iowait decrease?