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On Fri, 14 Aug 2009, Lukas Beeler wrote:
On Fri, Aug 14, 2009 at 23:11, James Rich<james@xxxxxxxxxxx> wrote:
load average: 1.62, 1.38, 1.28
That is an usually high load for this machine.
Try running "vmstat 1" while the backup is running, and pay attention
to the "wa" column (IO wait). A high number in this column would
indicate a bottleneck in the IO subsystem on the Linux side.
In all my years of linux usage I've never run that particular command.
Very interesting. Running that shows typical results like this (while the
backup is running):
procs -----------memory---------- ---swap-- -----io---- -system--
----cpu----
r b swpd free buff cache si so bi bo in cs us sy id
wa
0 0 2568 6980 128 580576 0 0 0 211 478 296 0 0 99
1
That didn't format well, but it shows the "wa" column is 1. Running this
for some time results in an occasional 2 in that column and a somewhat
more frequent appearance of 0. In my opinion, those are not high numbers.
So I still think the iSeries is the source of the low performance.
James Rich
if you want to understand why that is, there are many good books on
the design of operating systems. please pass them along to redmond
when you're done reading them :)
- Paul Davis on ardour-dev
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