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EC2 Micro Instance CPU spikes to 100% at regular interval every day

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http://stackoverflow.com – I know Amazon throttles micro instance if it uses up certain number of CPU time, but I don't think this is the case. All the spikes appear at around 6:30 to 6:40 UTC. I checked my cron job and there is nothing scheduled for that time: @reboot ~/path/to/script1.sh >> ~/log/cron.log 0 13 * * * ~/path/to/script2.sh >> ~/log/cron.log What else could it be? PS: Notice the CPU Utilization dropdown is set at "Maximum". The graph looks similar for "Average". PPS: This instance is part of a 2-instance load-balanced setup. Here's what's inside my /etc/cron.daily (the other crons are e (HowTos)