[Bizgres-general] Sizing a server to host Bizgres...

[Luke Lonergan]

Hannu,

On 5/2/06 5:47 AM, "Hannu Krosing" <hannu at skype.net> wrote:

> or maybe DMA is not enabled, what does "hdparm /dev/hda" say ?
> 
> modern IDE disk get usually something in between 40 and 80MB/swc

This is absolutely the problem - I never understood why RedHat kept the
default I/O settings for ATA so pathetically bad.

You need to go to /etc/sysconfig and edit the file "harddisks" there.
Uncomment all of the commented settings and add "-u1" to the EXTRA_PARAMS=
line.

To have these settings take effect before reboot, issue this command:
  hdparm /dev/had -d1 -c1 -m16 -u1

Then do a "hdparm -tT /dev/hda" to benchmark it.

- Luke