Interesting, I’ve not seen this before. Do you think it’s worth splitting this out into a separate thread since this is another issue to the original issue of this thread? Done.
Could you post output of $sudo top to show the memory use of mqtt_service?
What happened in the last few days, did the memory use continue to increase? Did the system crash?
Is @Pukka running a stock emonSD setup? Have there been any changes made?
What version of Mosquitto, Redis and Emoncms and Emonhub is @Pukka running