Re: Where is my bottleneck?

["Luke Lonergan" <llonergan(at)greenplum(dot)com>]

Arnau,

On 1/24/06 10:40 AM, "Arnau Rebassa Villalonga" <arebassa(at)androme(dot)es> wrote:

> I know it's a  problem with a very big scope, but could you give me a
> hint about where I should look to?

Try this:

  time bash -c "dd if=/dev/zero of=bigfile bs=8k count=2000000 && sync"
  time dd if=bigfile of=/dev/null bs=8k

And report the results back here.  If it takes too long to complete (more
than a couple of minutes), bring up another window and run "vmstat 1" then
report the values in the columns "bi" and "bo".

- Luke