Re: Really bad KVM disk performance

[Marcelo Roccasalva <marcelo-centos@xxxxxxxxxxxxxxxxx>]

On Mon, Feb 20, 2012 at 02:26, Bob Puff <bob@xxxxxxxxxxxx> wrote:
>
> Hi Gang,
[...]
> On my machine's Centos 5.7 x32 guest install:
> # hdparm -tT /dev/hda
>
> /dev/hda:
>  Timing cached reads:   1864 MB in  2.16 seconds = 863.87 MB/sec
>  Timing buffered disk reads:  358 MB in  3.08 seconds = 116.17 MB/sec

"cached reads" is a measure of linux buffer bandwitdth, not disk
performance!!. It should be several thousands... In a real machine, it
could be a motherboard problem...

--
Marcelo

"¿No será acaso que ésta vida moderna está teniendo más de moderna que de
vida?" (Mafalda)
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