Re: [Xen-devel] Working around xenstored performance?

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

If you can run as root on the box you can make a libxenctrl call yourself to
xc_domain_getinfo() or xc_domain_getinfolist().

 -- Keir

On 31/7/08 09:41, "Pim van Riezen" <pi+lists@xxxxxxxxxxxx> wrote:

> Good Day,
> 
> For monitoring purposes, we have a process that sends a 'xend.domains'
> methodCall to xend at timed intervals. Our problem here is that this
> call, if the extra parameter is not '0', is pretty slow; xenstored
> will run with 40% cpu grinding over its database before coming up with
> a reply, hardly something you want to do like every 15 seconds. With
> the parameter on 0, the response is instantaneous, but lacks any
> information beyond the list of currently running guests.
> 
> Is there a less intrusive way to just get the cpu-counter for a
> specific guest through /proc/xen or some such? I'd also be perfectly
> happy to fish the information out of xenstored's tdb-file, but all of
> its records seem to be in an undocumented binary encoding so that's
> not really helping either.
> 
> Our set-up is the Fedora branch of 3.0 (but from what I can read, 3.1
> still has this problem).
> 
> Cheers,
> Pim van Riezen
> 
> 
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