Need Help Diagnosing Server Wierdness

[Simon Chatfield]

Hi Mark, monitor i/o wait when this goes on, see if it spikes.You can see that from top as 'wa'. I wonder if you have a disk issue.

-Simon

On May 25, 2013, at 11:59 AM, Mark Phillips <mark at phillipsmarketing.biz> wrote:

> I have an old headless server running Linux version 2.6.32-5-686 (Debian 2.6.32-48squeeze1) (dannf at debian.org) (gcc version 4.3.5 (Debian 4.3.5-4) ). Recently, when I log in using ssh the terminal window freezes for a few seconds, then usually comes back. The command line stops printing the characters I am typing, the cursor stops blinking, and then after a few seconds, it comes back. This happens every few minutes, so it is becoming rather annoying.
> 
> When I check the disks, I get
> # df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda1             182G   42G  131G  25% /
> tmpfs                 505M     0  505M   0% /lib/init/rw
> udev                  500M  140K  500M   1% /dev
> tmpfs                 505M     0  505M   0% /dev/shm
> /dev/sdb1             230G  146G   72G  67% /mnt/sdb
> 
> So I am not running out of disk space. 
> 
> When I run top, I get this output:
> Tasks:  90 total,   3 running,  87 sleeping,   0 stopped,   0 zombie
> Cpu(s):  7.0%us,  3.0%sy,  0.0%ni, 82.7%id,  6.6%wa,  0.3%hi,  0.3%si,  0.0%st
> Mem:   1032748k total,  1013748k used,    19000k free,   242992k buffers
> Swap:  2017272k total,     1040k used,  2016232k free,   473584k cached
> 
> So I am not running a process that is taking over the CPU.
> 
> How should I go about diagnosing this problem?
> 
> Thanks!
> 
> Mark 
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss at lists.phxlinux.org
> To subscribe, unsubscribe, or to change your mail settings:
> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.phxlinux.org/pipermail/plug-discuss/attachments/20130525/009cb8f9/attachment.html>