Re: rrdtool memory usage and the Raspberry Pi
Simon Hobson <[email protected]>
| Newsgroups | gmane.comp.db.rrdtool.user |
|---|---|
| Message-ID | <[email protected]> |
Rafal Gwizdala <[email protected]> wrote: > Maybe the file size growth is expected to be parabolic - i think every RRA is 'global' - it covers all the data sources. So when you're adding DS and RRA pair you're actually adding N RRAs where N is number of data sources. At least this is how i understood the concept of RRAs. Yes, that is correct - each RRA applied to every DS in the file. File size will scale (roughly) as D*R where D is number of data sources, and R is number of RRAs. > [08:32:57 pe@hope] $ rrdtool create test.rrd \ > > --step 1s \ > > DS:progreset:GAUGE:1000s:0:1 RRA:MAX:0.1:5s:5000m \ > > DS:tpm:GAUGE:1000s:0:1 RRA:LAST:0.1:5s:5000m \ > > DS:voltcontrol:GAUGE:1000s:0:1 RRA:LAST:0.1:5s:5000m \ Duplicate RRA > > DS:freqcontrol:GAUGE:1000s:0:1 RRA:LAST:0.1:5s:5000m \ Another duplicate > > DS:fault:GAUGE:1000s:0:1 RRA:MAX:0.1:5s:5000m \ > > DS:uff:GAUGE:1000s:0:1 RRA:MAX:0.1:5s:5000m \ > > DS:off:GAUGE:1000s:0:1 RRA:MAX:0.1:5s:5000m \ > > DS:uvf:GAUGE:1000s:0:1 RRA:MAX:0.1:5s:5000m \ > > DS:ovf:GAUGE:1000s:0:1 RRA:MAX:0.1:5s:5000m \ 5 more duplicates > > DS:svopen:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:svclose:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:bvopen:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:bvclose:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:syncen:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:busconnen:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:wmfull:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:wmmed:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:wmlow:GAUGE:1000s:0:1 RRA:AVERAGE:0.1:5s:5000m \ > > DS:vred:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:exciter:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:ired:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:iwhite:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:iblue:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:f:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:isp:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:dlred:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:dlwhite:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:dlblue:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m \ > > DS:svpos:GAUGE:1000s:0:32000 RRA:AVERAGE:0.1:5s:5000m Another 19 duplicates As a matter of style, I always put my RRAs at the end - so I have some "header" stuff, then a list of DSs, then a list of RRAs. Makes it much easier to read. As an aside, does it matter what order they are declared in ? Ie, if an RRA is declared before all the DSs, does it still apply to all DSs ? I would hope so.