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luci-app-statistics: modify default amount of data items in RRD

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Increase the default number of data items in the RRD database
from 100 to 144. That leads to better matching summarising/averaging
moments between day & week and week & month at the averaging intervals:
30sec, 10min, 70 min, 5h10min, 2d13h

Previous 100 led too easily to situations, where the longer period's
more scarce data gets selected for displaying in the graph. That could
happen if the longer period's last data point was stored more recently
than the last data item in the originally required period.
(E.g. if the last "week data item" was more recent than the last
"day data item", the week data was used for the day chart.)

(Note: this change only applies in a live router if the RRD database is
empty. E.g after reboot or after emptying the RRD database dir.)

Reference to discussion at #4065

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
(cherry picked from commit 591b918ea4)
This commit is contained in:
Hannu Nyman 2020-05-21 17:19:55 +03:00
parent 8d89f0d4e6
commit 0c6fd62d65
1 changed files with 1 additions and 1 deletions
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applications/luci-app-statistics/root/etc/config/luci_statistics
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@ -19,7 +19,7 @@ config statistics 'rrdtool'
config statistics 'collectd_rrdtool'
option enable '1'
option DataDir '/tmp/rrd'
option RRARows '100'
option RRARows '144'
option RRASingle '1'
option RRATimespans '1hour 1day 1week 1month 1year'