Hi , I did develop production monitoring system using node-red and interface with 25 units of raspberry pi.
My scope is quite big, monitoring incoming data via MQTT and every second calculate production target to be achieve with knowing the cycle time.
While try out first 10 units with raspberry pi, system went very well and no issues at all. After 2 weeks , I did add 8 units of raspberry. No issue.
Than i did add another unit, I can't see any tab's but the system is runing. In terminal i able to view MQTT transaction and data output as well.
My pc specification is Intel® Core i5-8400 [8th Generation processor] 4GBx1DDR4. 1TB 7200 rpm harddisk. Runing on Ubuntu 18.04.
Is this due to RAM?