Default frequency of generation of images

[Peter Fletcher]

Is the default frequency of generation of the longer-term images (week, month, and year) displayed by the report index page documented somewhere? I cleared out some junk (data from when the station was in a a previous location) from my weewx database, and was somewhat surprised, after leaving what seemed like a reasonable time for new reports to be generated, to see the deleted data still displayed on the 'year' reports. After a bit of spelunking and checking of file dates, it appears that the 'day' images are updated at each archive cycle (5 minutes, in my case), the 'week' and 'month' images are (probably) both updated 'every hour, on the hour', and the 'year' images are only updated every day at midnight. This makes perfect sense, in terms of avoiding pointless processing, but I can't find it documented anywhere - the implication I previously took from the documentation was that every image was updated every archive cycle. If this default isn't currently documented, it probably deserves a note somewhere.

[Peter Fletcher]

In the interest of accuracy: it looks as if the 'month' images are actually updated every three hours (midnight,3:00,6:00,9:00,...).

[Mike Revitt]

I was about to post the same question, but in my case the daily images have different generation times. Looking at the page some look like they are being generated every 5 minutes, the archive interval, but other look like they are generated hourly. 

Is there a setting for this 

[Mike Revitt]

Solved my own problem, when cleaning up some rouge values in the database I set the values to '' instead of null, this caused a value error

[Tom Keffer]

Images are re-generated as often as the aggregation interval they use. For example, if an image uses an aggregation interval of 3 hours, then it will be regenerated every 3 hours.

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[Peter Fletcher]

Where are the aggregation intervals set? The defaults seem to work very well, but I can imagine circumstances under which I might want to 'tweak' them.

[Tom Keffer]

Option aggregation_interval in skin.conf.

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[Peter Fletcher]

Thanks!

Option aggregation_interval in skin.conf.

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