The Speed of Time
Brendan Gregg
SEPTEMBER 25, 2021
CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. A quick check of basic performance statistics showed over 30% higher CPU consumption.
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