You can see all node-red entries using
cat /var/log/syslog|grep -i node-red
Thanks... I don't want to see them, they're what's overloading the logfile.
But that got me in the right direction. I added the -v option, and sent output to a file, so I was able to open that new filtered file in Nano, making it much easier to navigate. Still digging, as it's still very large, though.
Copy the relevant syslog file to your PC then you can open it in a text editor to examine at your leisure without having to wait for the data to be transferred across.
Not enough bandwidth for large file copies, I'm mostly stuck down at telemetry data over the link, and that's it...even when I Cat the syslog over Putty from home, hardware at the far end stops responding to pings because of the bandwidth loading.
Though I will possibly try to copy the new filtered file (don't want to unload the editor and see how large it is yet, took too long to scroll down and don't want to reset that).
I suggest you start a new thread with a title that indicates that you want to know how to reduce the logging generated by node-red-node-snmp (assuming that is the node you are using). Then the right person will hopefully respond.
Any reason not to edit this one if that's possible? Perhaps my original title was too foundational to the objective. A new thread would effectively be a duplicate, and the question has somewhat evolved/refined through this thread.
Are you sure that is necessary? What does this show
ls -l /var/log/syslog*
Is there a reason NOT to do it? SD card seem to be the lost likely point of failure in the system.
It's a question of how quickly I can recover from a fault/failure. In my dashcam, I cycle large video files continuously on an SD card and it's no big deal because I can swap it out quick if it fails.
This Pi is in a very inaccessible place several hours drive away, so I can't swap it out for a few days if the SD card fails. Then I've lost telemetry and security video until I can get on site. This is actually the second Pi to be used there; first had an SD card failure, and I set up a new one at home to swap out on site, then did postmortem when I got home.
I still want to reduce the output from NodeRed to syslog, but the grep direction got me moving now.