I´m working in a rs-485 power meter web telemetry interface using raspbian, node-red in a raspberry pi3. I used the modbus nodes. I was increasing my flows, testing and improving. It´worked fine until suddenly, the web interface started to show a loading problem. I try to open node-red directly on t…

Start by going back to the version before you made the changes that may be causing the problem. Then you will know whether it is your flow or something else. If for some reason you have not been keeping backups then disable all tabs and check it comes up ok, then you can enable them again to find w…

Hi Colin. Apparently, I found the problem. It was related to the amount of libraries that are in the folder /home/pi/.node-red/lib/. In the menu in the upper right corner "= > import > library" many libraries would appear. I think it's a problem to have many libraries in this folder. The Web browse…

[image] ftonello: It was related to the amount of libraries that are in the folder /home/pi/.node-red/lib/ That is interesting and slightly worrying. Some questions: What version of Node-RED and Node.JS are you using? Is this on a Pi? If so, what version of the hardware? Can you check your…

Answers: What version of Node-RED and Node.JS are you using? A: 0.19.5: Maintenance Release Is this on a Pi?If so, what version of the hardware? A: Yes. Working a RASP PI 3 Model B V1.2. With a Schneider EGX100 on the netwok (port 502). Worked with serial adpater as well directly to raspberry …

You haven't said what version of node.js you are using. To find out run node -v

If there are lots of files under .node-red/lib then the runtime has to do more work to index them when the editor is loaded. I've not seen it cause problems, but there is certainly a correlation between number of files and amount of work the runtime has to do. Something for us to dig into. A genera…

[image] ftonello: but was definitely the amount of libraries in the /home/pi/.node-red/lib/ folder I get that, but swap use is directly related to how much the device has to load into memory. So if all of the library is being loaded it may take you over the limited memory capacity of the Pi a…

On my RPi Zero W with a startup on boot script it takes NodeRed about 1 minute to load. Is there a way to improve it?

My Zero takes about 40 seconds with a very simple flow, so if you have a more complex flow then what you are seeing is probably what you have to put up with. It is not a problem for me, after all how often do you stop and start node-red? Re-deploying only takes a few seconds.

Node red web page not loading or slow loading

General

knolleary 6 February 2019 09:26 12

The main cost at startup is scanning for and loading the node modules. The more modules you have installed, the longer that will take. So one way to speed up is to remove all modules you are not actively using. Beyond that, you are then limited by the speed of your SD card and the available memory (ie how much swap activity is going on).

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Node red web page not loading or slow loading

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