When I first started with Node-red. I had trouble with memory leak, but after 1 or 2 months, it disappeared. Now for as long as 2 months, I have the same issue again. But my application works fine, so far. Every now and then the memory hit some 95%, and then resets to about 50 to 55 % and then bui…

I don't see any problem there. Linux tries to make best use of all the memory there is, keeping disc buffers in RAM and caching stuff where possible. To get actual amount of memory available for use you have to look at the mem available figure. Node red is only using 17% of the ram.

Probably not related to your recent problems but certainly do look at InfluxDB and make certain that you have a retention policy in place for any detailed data. On your Pi, eventually you will start to get CPU spikes and SWAP use. Try to keep detailed records only for a limited time. Typically I ke…

@Colin . Thanks. Yes, I can see also, that node-red is in fact only using 17 - 18% of the total memory it shows in TOP. Why dos it say in Node-red that it uses almost all of 924 MB available? Is there a way to increase mem available for Node-red? [afbeelding]

@TotallyInformation , thanks for your input. I try to keep good use of databases. I have a "real-time" database with standard retention of 8 hours. And at midnight I store my daily values in long term database. Then I have some other values I want to keep a bit longer then 7 days I have 2 databases…

There is this 'Environment="NODE_OPTIONS=--max_old_space_size=512"' when using systemd https://raw.githubusercontent.com/node-red/linux-installers/master/resources/nodered.service I would also recommend trying quite an aggressive retention policy as @TotallyInformation described. Doing so allowed…

[image] henkkas: Why dos it say in Node-red that it uses almost all of 924 MB available Look at top again, whatever node you are using is showing the free mem and total figures, instead of of mem available. [image] henkkas: Is there a way to increase mem available for Node-red? Why? …

@Colin I get this information from nodes provided by > node-red-contrib-cpu and > node-red-contrib-os I also read about garbage collection and how to monitor with > node-red-contrib-gc that gave me graphical info about this, see pic.Time frame is 15 min. [afbeelding]

@ozpoz, I make use of the same SD card you mention. As I said, I try to keep the load on influx low. But Am I to understand, that all of you have the same kind of behaviour on memory, that's mounting up until almost max. and then resets again (by lack a better word)?

Is it possible that the level of monitoring is contributing to the problem. How many points are you showing ?

[image] henkkas: Am I to understand, that all of you have the same kind of behaviour on memory, that's mounting up I have not experienced this.

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Memory leak ?... trouble performance now

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Memory leak ?... trouble performance now

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