[CentOS] CentOS 6 spontaneous reboots

Mon May 30 03:20:21 UTC 2016
Anthony K <akcentos at anroet.com>

On 30/05/16 10:10, Bill Gee wrote:
> What else can I look at?


sar -m TEMP | less
(sar can be found in the sysstat package)


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

*[0]*    http://www.brendangregg.com/index.html
*[1]*    https://www.youtube.com/watch?v=FJW8nGV4jxY