Hi everyone,
I am still at 25.7 and since a few weeks I encounter system instabilities and increased Disk I/O. Both might not be related, but Disk I/O is something I want to look into first, because it is also visible from the outside.
My OPNsense box has a Disk activity LED. Usually this one flashes up once every 5-10 seconds I would say. Recently it is more like every 0,5 seconds, sometimes even constantly on for a few seconds. When I set up my OPNsense around a year ago, I paid attention to minimize logging as much as possible, but either things might have changed due to new functionality / updates, or my system is having issues which is causing more logging.
I lack the knowledge in BSD how to find out which processes or parts of OPNsense are causing the Disk I/O and I would appreciate if someone could point me in the right direction.
I am not saying that OPNsense is causing the crashes I encounter, but maybe it is logging some faults that lead to the crash after a while. Also, if possible, I want to find the root cause of the Disk I/O to bring it down again for less heat and wear of the SSD.
Any help is appreciated very much.
Thank you very much in advance :-)
Have a look at Hostwatch - high disk writes (https://forum.opnsense.org/index.php?topic=50405.0).
Thank you very much. I figured before I track this down, I upgrade to 26.1 instead... and now it got worse. Since this is another version, I will open another thread in the 26.1 section.
To have the answer to my question here, just in case someone else stumbles upon it:
```
top -S -m io -o total
```
Shows the processes causing I/O.
See other thread. Disable hostwatch. It's a new non-essential feature. It's going to mature but if it gives you trouble now, your firewall will work just as well with it disabled.
Just linking the other thread, because it has the solution to my problem: https://forum.opnsense.org/index.php?topic=50783.0 (https://forum.opnsense.org/index.php?topic=50783.0)