[rrd-users] Re: Performance (Was: Help with Bash script to calc end-time in multiples of 300 ?)

Alex van den Bogaerdt alex at ergens.op.het.net
Mon Nov 20 23:01:45 MET 2006

On Mon, Nov 20, 2006 at 08:12:12PM +0000, Simon Hobson wrote:

> Thanks, works a treat. While I was at it, following from other 
> threads on performance, I've also tweaked my graphs to have one 
> pixel/sample and the performance boost is "quite acceptable" ! Not 
> only plotting speed, but memory consumption is very significantly 
> reduced - down from being touch and go if it would run out with 3/4G 
> RAM plus 1G swap to not swapping at all when plotting a stack of 254 
> in and 254 out values.

Weird.  Now we have

"did nothing measurable"
"quite acceptable"

> I'm most happy now :-)
> Just waiting for the boss to ask why I've got such odd graphing periods !

Or change the image width ("--width" option).

E.g. 288 pixels, 300 seconds per interval, equals one day (using an RRA
of 1 PDP per CDP).

336 pixels, 6 * 300 seconds per interval, equals one week (using an RRA
of 6 PDPs per CDP).

Alex van den Bogaerdt

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