[mythtv-users] 'wa' field in 'top' is +90% when recording a show

[Daniel Walton]

> >
> > backend:~# dstat -a
> > ----total-cpu-usage---- -disk/total -net/total- ---paging-- ---system-- ---load-avg---
> > usr sys idl wai hiq siq|_read write|_recv _send|__in_ _out_|_int_ _csw_|_1m_ _5m_ 15m_
> >  14   2  72  12   0   0|   0     0 |   0     0 |   0     0 |   0     0 |2.41 2.36 1.42
> >   3   1   0  96   0   0|4740k    0 | 192B 2468B|   0     0 | 367   250 |2.41 2.36 1.42
> >   1   1   0  98   0   0|3048k    0 |  64B  362B|   0     0 | 351   149 |2.41 2.36 1.42
> >   0   0   0 100   0   0|   0  4096B|  64B  362B|   0     0 | 329    51 |2.38 2.35 1.42
> >   0   0   0  97   0   3|   0    96k|  64B  346B|   0     0 | 331    52 |2.38 2.35 1.42
> >   4   1   0  95   0   0|4100k 4096B|  64B  346B|   0     0 | 360   195 |2.38 2.35 1.42
> >   4   2   0  94   0   0|6560k    0 |  64B  362B|   0     0 | 383   274 |2.38 2.35 1.42
> >   5   1   0  93   1   0|8200k    0 |  64B  362B|   0     0 | 394   326 |2.38 2.35 1.42
> >   4   2   0  94   0   0|6152k 4096B|  64B  362B|   0     0 | 377   267 |2.35 2.34 1.42
> >   0   0   0 100   0   0|   0     0 |  64B  362B|   0     0 | 328    49 |2.35 2.34 1.42
> >   0   0   0 100   0   0| 128k   20k|  64B  346B|   0     0 | 333    57 |2.35 2.34 1.42
> >   1   0   0  99   0   0| 256k    0 |  64B  346B|   0     0 | 330    59 |2.35 2.34 1.42
> >   6   4   0  90   0   0|10.4M    0 |  64B  346B|   0     0 | 413   403 |2.35 2.34 1.42
> >   5   1   0  93   1   0|13.0M   16k| 128B  850B|   0     0 | 600   566 |2.32 2.34 1.42
> >  10   6   0  85   0   0|7812k    0 | 128B  954B|   0     0 | 234   324 |2.32 2.34 1.42
> >   1   0   0  99   0   0| 644k    0 | 234B  898B|   0     0 | 339   129 |2.32 2.34 1.42
> >            ^^^^^
> >
> > My cpu has been pegged due to wa for 10 minutes now.
> >
> >
>
> have you used top to see what CPU the LVM is using?

LVM isn't using much cpu at all, it doesn't show up in the top 30 or so
processes in top.


> Did you go with a striped LVM?

I'm not sure, I followed the LvmHowTo from the knoppmythwiki

http://www.knoppmythwiki.org/index.php?page=LvmHowTo

It doesn't mention this being a striped setup.

Daniel