[linux-lvm] LVM & high system load

[S. Michael Denton]

Dominique.Larchey-Wendling at loria.fr wrote:
> Dominique LARCHEY-WENDLING wrote:
> 
> 
> > relatively poor IO perf. (my cpu is only PII 333) on LVM volumes. I
have
> > tested reiserfs and ext2fs and I only get about 2.5Mb/s with 100% CPU
> > load,
> > mostly system time.
> 
> More over, doing a CPU intensive task (like kernel comp.) (not involving
> LVM, the
> sources are not on a LV) cut the IO perf. of LVM fs by half.
> 
> So it seems that the LVM is eating a lot of CPU on my system and this is
> what is limiting fs perf.

I doubt it, I've got LVM0.9.1b7 on a 486 without any real load... even when
compiling the kernel.  I also have reiserfs on 2.2.19.	I noticed in your
previous post that you had 3 pv's on the same physical disk... that may be
contributing, depending on your PE layout on the PVs.  If not, it's
definitely silly :)

> DL
> 
> -- 
> Dominique Larchey
> LORIA, Nancy, France
> Tel. (Work) +33 (0) 3 83 59 20 13
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> 
> 

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Scott Denton
smdenton at bellsouth.net
EFNet Handle: SteelWyng