On Wed, Nov 26, 2008 at 08:10:39AM -0500, tmassey AT obscorp DOT com wrote:
> > Have you looked at the wait column (last one) in vmstat?
>
> As in iowait? Usually the CPU is "100%" used, but much of it is iowait
> (~40-60%, IIRC). Of course, you *expect* that: I'm I/O bound, after all,
> with only a single IDE hard drive... Also, I'm not using compression,
> which is also why I'm not worried about CPU.
In my version of vmstat, iowait is not accounted to CPU usage (SuSE
10.2). You're doing quite good according to the numbers you gave. Look
at this:
[...]
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 6 25284 90556 115956 2869496 0 0 8 1008 373 1377 0 0 0 100
1 7 25284 90556 115964 2869488 0 0 4 684 389 1354 1 0 0 99
0 8 25284 90432 115976 2869624 0 0 8 3480 377 1353 0 1 0 99
1 7 25284 90184 115996 2869604 0 0 4 620 405 1434 0 1 0 99
*That* is I/O constrained! B-| Another server though, no connection to
BackupPC, I'm not even sure what it was doing there.
> > How many files per server do you have?
>
> ~500,000 each. The pool has ~800,000 files.
>
> > I've got over 2 million files in the pool. If
> > your server is swapping, you _need_ more RAM.
>
> It is not. The amount of swap in use, IIRC, is measured in *kilobytes*.
> But who cares how much data is sitting in the swap file? If I had a swap
> file with *gigabytes* of data in it, who cares? As long as swap BI/BO is
> 0, it can sit there quite comfortably. Remember, swap is a *verb*: if
> you are not *actively* swapping, it does not matter.
Right, thatswhy I wrote "if your server _is_ swapping", not "has swapped".
Bye,
Tino.
--
"What we nourish flourishes." - "Was wir nähren erblüht."
www.lichtkreis-chemnitz.de
www.craniosacralzentrum.de
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