One of my Linux web servers (running Fedora) starting coming up with these messages:
Message from syslogd:
kernel: CPU0: Temperature above threshold
CPU0: Running in modulated clock mode
I couldn't tell how slowly the CPU was running, but it was dog slow, and the server load was outrageously high.
I was curious as to what temperature the CPU was running at, so I took a look at the pseudo file:
/proc/acpi/thermal_zone/THRM/temperature
using cat and the ACPI sensor showed a whopping 83 degrees Celsius. I called the hosting company and they found a faulty CPU fan and replaced it.
Just thought I share this in case you didn't know how to check the temperature of Linux boxes and want to find out.
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