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CPU utilization is wrong, says Netflix's Brendan Gregg

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Everyone uses %CPU to measure performance, but everyone is wrong, says Netflix's Brendan Gregg in his UpSCALE Lightning Talk. CPU utilization is wrong CPU utilization is the metric everyone uses to measure a processor's performance. But %CPU is a misleading measure of how busy your processor really is, says Brendan Gregg[2], senior performance architect at Netflix[3], in what he calls a "five-minute public service announcement," at the 16th annual Southern California Linux Expo (SCALE[4]). In his Lightning Talk, "CPU Utilization is Wrong," Brendan explains what CPU utilization means—and doesn't mean—about performance and shares the open source tools he uses to identify reasons for bottlenecks and tune Netflix's systems. He also includes a mysterious case study that's relevant to everyone in 2018. Watch Brendan's talk to learn how

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