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Old 10-24-2004, 06:50 PM   #1
plisken
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Server crashed this evening:(


I'm running various services from and AMD K6II 550MHz powered box, running Slack 9.1. This machine has only ever required rebooting due to power failure or similar, it has been to date much, much better than my previous expierances with RH and SuSe.

Anyway, I run a number of different websites, mail and a few other bits and bobs, without an issues at all, but this evening, I started to run Seti http://setiathome.ssl.berkeley.edu/
This obviously may be conincidence, but I thought I'd mention it anyway. When running the Load average, as displayed from the top command shows something along the lines of 1.30 0.85 0.49 , normally this would be something like 0.00 0.02 0.01 so I figured that the mahcine was having to work, even when the seti program was niced to 19

Is it possible that this kind of additional load caused my machine to reboot? there are no logs of interest in either messages or syslog, would this not be indicative of a hardware issue rather than a software/OS issue?

The only other stranges thing that I noticed prior to the reboot, was...

I started X, running KDE and found that when ever I tried to view the files listed on one of the scsi drives, the window would dissapear, never had this before either.
At the point immediantly before the machine rebooted, without warning I may add, I was listing files on that same drive, though not in X

As it happens, I'm shutdown the Seti program meantime.

Obviously I've seen many, many system crashes on Windows, but not on Linux, and especially not without some form of warning/panic.

All help appreciated in order to try and find a cause...
 
Old 10-24-2004, 06:58 PM   #2
CompDude
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I'm thinking when your processor went under full load the power supply didn't compensate and just didn't give enough power; thus, your computer rebooted randomly and without warning.
 
Old 10-24-2004, 07:00 PM   #3
ilikejam
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Sounds like an overheating problem to me. You might want to check your heatsink and fans.

Dave
 
Old 10-24-2004, 07:24 PM   #4
plisken
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Think I'll shut it down in the morning and give it a nice vacuum, checking fans etc as we go.

Slightly concerned that running Seti caused the Load to increase so much anyway.

The Load average, anybody got a good explination of what the three readings equate to?


# ilikejam: Glasgow? Didn't think there was another Linux user so close

Last edited by plisken; 10-24-2004 at 07:25 PM.
 
Old 10-24-2004, 07:39 PM   #5
btmiller
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The load average is simply the number of runnable processes (e.g. processes that are in the OS run queue and not stopped waiting for I/O or something) existent in a period of time divided by the length of that period of time. So for instance if, in a five minute period, you had two processes that ran for two minutes apiece, and no other processes ran, you'd have had a process running on the CPU 4/5 minutes, for a load average of 0.80. Now, for SETI, even though you set in at nice 19, it will still run all the time UNLESS a higher priority process comes along, in which case that process will run instead. So if there are no higher priority processes, SETI will consume all of the CPU cycles.
 
Old 10-24-2004, 07:56 PM   #6
plisken
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Quote:
Originally posted by btmiller
The load average is simply the number of runnable processes (e.g. processes that are in the OS run queue and not stopped waiting for I/O or something) existent in a period of time divided by the length of that period of time. So for instance if, in a five minute period, you had two processes that ran for two minutes apiece, and no other processes ran, you'd have had a process running on the CPU 4/5 minutes, for a load average of 0.80. Now, for SETI, even though you set in at nice 19, it will still run all the time UNLESS a higher priority process comes along, in which case that process will run instead. So if there are no higher priority processes, SETI will consume all of the CPU cycles.
Nice explination!

But there are 3 entries under Load Average...
 
Old 10-24-2004, 08:20 PM   #7
btmiller
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See man uptime -- the first is the load average for the last minute, the second for the last 5 minutes, and the third for the last fifteen minutes.
 
  


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