[SLL] Strange performance problem

[Creede Lambard]

What happens when you run strace on a command? That might either give 
you some indication of what the system is hanging on, or if something is 
blocking it.

Of course if the hang isn't happening in user space it might not show up 
in strace . . .

Glenn Stone wrote:
> On Mon, Jan 01, 2007 at 10:29:55AM -0800, Ski Kacoroski wrote:
>   
>> Hi,
>>
>> I have a linux server (debian 3.0r2) that is really slow and I cannot 
>> figure out why.  Whenever you run a command (e.g. ls, man, df, etc.) it 
>> takes 30 - 40 seconds for the command to complete.  Running top and sar 
>> shows an io wait of 0%, a load average of over 5, 95% idle cpu.  Only a 
>> small bit (17Mb) of swap is being used.  It has a 3ware 9500 card with 
>> lots of disk in a raid 5 and there is lots of space left in all the 
>> partitions.
>>
>> Any ideas are appreciated.
>>     
>
> Do you have 3dm installed?  Smells to me like you've got a degraded or
> rebuilding array... 
>
> -- Glenn
>
>