[Novalug] need help: server freezing -- How to troubleshoot - Diagnostic tools

[Jay Hart]

I think 'ntop' is an update 'top' app.

Jay

> Richard Ertel wrote:
>> gkrellm appears to be a graphical application. my server is
>> console-only. are there any daemon-type cpu monitors that can write to
>> a log file, to be checked after a lockup?
>
> 	Uh, top, perhaps? And it may not hurt to use free, too.
>
> 	Indeed, the entire sysstat package (e.g., iostat, vmstat) might be
> useful. There are plenty of tools that generate diagnostic information,
> I simply cannot remember them anymore. My system administration
> knowledge has atrophied due to non-use.
>
>> On Fri, Oct 23, 2009 at 08:59, Jay Hart <jhart at kevla.org> wrote:
>>> The only thing I saw was this:
>>>
>>> Oct 22 17:38:09 fileserver kernel: [   29.076525] ata3.00: failed to set
>>> max
>>> address
>>> (err_mask=0x1)
>>>
>>>
>>> Don't know if it has anything to do with anything (though it might).
>>>
>>> I'm wondering if maybe somehow your CPU is being heavily taxed and its
>>> "appears" for all intent purposes your box is locked up.
>>>
>>> Install gkrellm and monitor the CPU usage (visually) to see if your CPU
>>> utilization spikes.
>>>
>>> In summary (following Jerry W suggestion):
>>>
>>> 1. Install gkrellm
>>> 2. Monitor CPU utilization
>>> 3. Report findings to list
>>>
>>> Jay
>>>
>>>> Jay, here is my /var/log/messages. ugh it's big.
>>>> i was running the system with just the two raid-1 drives last night
>>>> (oct 22), then it locked, so i powered it down and went to bed. turned
>>>> it back on this morning (oct 23) around 6am. anyone looking at this
>>>> log should start there and work backwards to the previous boot, i
>>>> guess.
>>>>
>
>