[ILUG] love this feature

[Brendan Minish]

Thanks for posting that 

iostat was one of those things that I read about, played with once or
twice and forgot about ;-) 

Now that you have reminded me of it I might actually remember to use it
the next time I am dealing whith suspected Disk I/O issues ;-) 

iotop is another handy tool as is latencytop (requires X I think) 
all these require kernel support for the relevant system timers etc,
Most kernels come with these enabled but if doing a custom kernel, it's
probably better to have these enabled even if there is a theoretical
slight performance hit under very high load since without them you can't
actually investigate why your system is keeling over .. 

Another one for the laptop people is powertop, Bootchart is good fun
too, if you want to try to work out why it takes so long to boot up. 

regards
Brendan 

On Tue, 2010-01-26 at 12:43 +0000, Conor Wynne wrote:
> [root at mammabear ~]# iostat
> Command not found.
>  * Waiting in queue.. Install package 'sysstat' to provide command
> 'iostat'? [N/y]
>  * Installing packages..
>  * Getting information..
>  * Resolving dependencies..
>  * Waiting for authentication..
>  * Resolving dependencies..
>  * Downloading packages..
>  * Checking signatures..
>  * Testing changes..
>  * Installing packages..
>  * Scanning applications..
> Linux 2.6.31.12-174.2.3.fc12.i686 (mammabear)     01/26/2010   
>  _i686_    (1 CPU)
> 
> avg-cpu:  %user   %nice %system %iowait  %steal   %idle
>           13.09    0.02    2.43    2.50    0.00   81.97
> 
> Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
> sda               2.77        39.03        18.55    2521786    1198708
> dm-0              4.10        38.89        18.49    2512810    1194976
> dm-1              0.01         0.02         0.06       1592       3664
> 
> That's very smart.
>