Re: How to generate 95th values? Was: How are the 95th values generated for Cacti? Are they wrong?

Currently, the Cacti 95th percentile is calculated as you suggested.
RRDTool would suggest to use a VDEF.
Reinhard

On 21.01.2013 19:08, James Bensley wrote:
> Hi All,
> 
> Further to my last post, it would seem that you can't accurately
> generate 95th percentile values directly from rrdtool (do please let
> me know if I am wrong, and you can provide a working example though!)
> 
> I have found a few references on the Internet to people struggling
> with this [1].
> 
> The obvious answer to me seemed to be to write a script to pull the
> values from an rrd file and generate the 95th for me. I have written a
> small bash script [2] which does just that (this whole exercise for me
> was to pull values and chuck them into an existing script that is part
> of another system, so this is a fine solution for me at least).
> Hopefully it will benefit someone else.
> 
> Cheers,
> James.
> 
> 
> 
> [1] http://oss.oetiker.ch/rrdtool/forum.en.html#nabble-td3649737
> This one was particularly interesting as it was on the rrdtool mailing list,
> and the two users have provided working examples but neither seem valid to me.
> 
> [2] http://null.53bits.co.uk/index.php?page=rrdtool-95th-for-joint-in-out
> 
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