I'm using Java Mission Control released with jdk 7u40. Is "Total CPU Usage" is calculated per core or overall?
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Its overall. so if you have 4 cores it can go up to 400%
Please see the ans link here as well

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Rohit Sachan
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But on JMC dashboard, CPU Usage dial still shows 100% as max. Does it mean values calculated with 400% base are converted to 100% base? http://imgur.com/vkcODCN – s.r Feb 06 '14 at 02:09
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It's normalized, both in Flight Recorder and the JMX Console. Maximum is 100%

Kire Haglin
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