[rrd-users] Monthly graph fetches data from yearly RRA instead of monthly one

[Simon Hobson]

Juma wrote:
>Thanks to your hint, I found out that rrdtool considers a month to be of 31
>days (that is 372 steps), while I had only 360 steps (30 days) in the
>database, so the graph tool, not having enough datapoints for the period was
>forced to use the yearly RRA.
>So, after changing the interval from '1m' to '30d', the graph became
>correct.

I always use explicit periods, avoids any possible confusion like that. Also, my RRAs have a bit more data than I need - so for example my "month" RRAs have something like 60 days in them.