On 30/05/16 10:10, Bill Gee wrote:
What else can I look at?
TL;DR
sar -m TEMP | less (sar can be found in the sysstat package)
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I have a Debian based media server that was exhibiting similar symptoms after having served me well for more than 4 years. During my troubleshooting, I came across Brendan Gregg's website *[0]* via his 2-part Youtube video *[1]* on Linux Performance Tools**.
Suffice it to say that I was able to nail my problem by installing the package 'sysstat' and enabling all performance counters. Within 2 days, I identified the root cause - temperature spikes during media cataloging which occurred on a periodic basis at 3am *_and_* whenever I added a video to my library. The following command was instrumental in determining this:
sar -m TEMP | less
I was able to correlate the output of the command above with my Plex logs. Since I did not have time to open the system up and do the thorough cleaning that was necessary, I wrote a script to monitor the temperature and to throttle the CPU down if the temperature hit 85% of max (the AMD CPU in the media server doesn't throttle internally). After time availed itself, I cleaned the server innards and changed the thermal paste which had dried up and wasn't performing optimally.
In any case, Brendan Gregg's website and Youtube video were (and still are) very helpful.
My $0.02 ak.
*[0]* http://www.brendangregg.com/index.html *[1]* https://www.youtube.com/watch?v=FJW8nGV4jxY