[hobbit] Optimizing Xymon disk performance

[Iain M Conochie]

Henrik Størner wrote:
> <snip>
>
> The standard 4.3.0 beta adds caching of RRD file updates, and this has a
> significant impact on the I/O load of the server - essentially, it means
> that hobbitd_rrd caches up to 12 updates (= 1 hour) before it does an
> actual update of the RRD file. Since the amount of disk I/O is almost
> identical whether you're doing one data update or 50, this caching
> eliminates about 90% of your disk I/O on the RRD files. So that would be 
> the simplest solution to implement.
>   

I am running 4.3.0-0.20080103 so quite an out of date version. However I 
would be interested in learning this. Would I have to upgrade my hobbit 
/ xymon installation to get this feature? What version contains it? How 
do I enable it?

Currently I have > 100,000 rrd files and the server sits with between 
20% and 50% i/o wait. Performance  is acceptable I guess  but anything 
to improve  this would be welcome.

Cheers

Iain

<snip>
> Regards,
> Henrik
>
>
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