The only way this can really happen is if you have a script that is periodically running and doing something horrible.

Have you configured the housekeeping scripts to run with incorrect settings?

/settings/section=housekeeping/ will show the config entry for rrd file max age.

Adam.

From: observium <observium-bounces@observium.org> On Behalf Of Tasnim Tamanna via observium
Sent: 08 December 2020 16:55
To: Observium <observium@observium.org>
Cc: Tasnim Tamanna <desideratasnim@gmail.com>
Subject: [Observium] Historical Data Graph

Everyday at a certain time, all historical graph data gets deleted. This is happening for all devices except one.

Can anyone tell what could be wrong?