[CentOS] Really bad KVM disk performance
Marcelo Roccasalva
marcelo-centos at irrigacion.gov.ar
Thu Feb 23 23:12:36 UTC 2012
On Mon, Feb 20, 2012 at 02:26, Bob Puff <bob at nleaudio.com> 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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