HA frequent restarts / Lost counter clicks

[eMGeeFFM (Markus)]

Hi there!
Running HA on a Synology NAS 918+ in VMM. So far, so good.
I integrated a gas consumption counter through a reed contact on my gas meter.
So whenever the wheel of the mechanical counter flies by, it triggers a signal.
That is covered by an automation which increases a counter helper by 1.
Works like a charm, basically.

Looking at the data though, I found out the hard way that my instance seems to reboot/restart
every 20 mins or so! And although I had set the helper to restore the last known value upon restart,
I get these peaks/hickups in the trend, which suggest that it does NOT return the last known one but a somewhat older one.

So two things - why would my HA restart every 20 mins in the first place (I got it improved to 1/hr by increasing the memory of the VMM to 2 GB)? And - even if it did, why does it not keep the highest reading that it once had (i.e. right before the restart)?

Thanks for your insight!!!

[WallyR (Wally)]

It is typical for systems to collect a bit a data over a short timespan and then commit it in one go.
Doing the writing right away would increase the resource usage a lot to handle the storage operations and it would also wear down the storage medium faster, especially for SDcard storages.
On a normal running system the commit of changes will happen automatically when the system is shutting down, but since you are probably experiencing unhandled errors that cause a sudden reboot, then there is no logic that can catch the events and commit the changes.