[rrd-users] Re: RRD Graph

[Sunil Modi (IT)]

> I am using RRD tool to monitor CPU usage by Oracle database. My data 
> source definition is DS:ds1:COUNTER:600:U:U. There is no 
> problem with the 
> graph if there is no negative value but if there is any 
> negative value 
> then I can see a sudden increase in the graph. How to avoid 
> this in the 
> graph whether I have to set any min or max in the data source 
> or any other 
> changes. Please let me know.

I believe what you want to use to track negative differences in values is DERIVE.
DS:ds1:DERIVE:600:U:U
>From what I understand, DERIVE works just like COUNTER but allows for negative gains as well as negative values.  The RRD Man pages have the information.  Hope that helps.

-sunil

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