[CentOS] machine responsiveness with centos 5.1

Clint Dilks clintd at scms.waikato.ac.nz
Wed Jan 23 00:34:23 UTC 2008


Jerry Geis wrote:
> every other day I do full backups to both a second internal disk and 
> an external usb disk.
>
> I am using a fully up to date centos 5.1 AMD 64 X2 6400+ machine. with 
> SATA disks.
> using an NVIDIA chipset,
>
> when I do a full rsync the responsiveness of my machine suffers. Slow 
> on the internal disk and really slow on external usb.
> doing "top" shows 0% idle but only 17% CPU usage by the rsync command.
>
> I am stunned that a 6400+ machine dual core can get this sluggish when 
> doing a copy to disk.
> Is there something I potentially have not set right?
>
> dmesg shows my SATA disks at UDMA133 and 1.5 Gbps.
>
> THanks,
>
> Jerry
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>
Hi

I would recommend you install the systat rpm and then use sar and iostat 
commands to see if you can identify where the bottleneck is occurring.

Have a nice day




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