Performances on Pi 3A+

nowayto

Hello,
I’m here to asking an help.

In the past I’ve set up an MM and it works good.
I started using a PI 3A+ with 512mb of ram, after some months and some performance issues I switched it to a pi 3B+ with 1GB of ram.

Honestly performance’s issues were not ram related, because the command “free” told me I have a lot of free mem but I switched anyway for “science purpose”

Anyway, on pi 3B+ it worked better.

After some months I decided to turn it back on a 3A+ for some reasons.
The 3B+ with a lot of ports is wasted on that project, 3A+ should be enuough and I’m right but some little problems appeared again.

Tha major problem is at startup: sometimes it started with a black screen and cursor and I need to manually CTRL+R to make the interface show correctly.

It’s very strange, in my limited mind an issue like that is related to RAM but is not.

“Free” shows me a good amount of Free RAM.

Thanks

sdetweil

@nowayto can you show the output of MagicMirror startup?
Are you using pm2 to launch MagicMirror?

Can you show the output of free -m

nowayto

@sdetweil Yes, I’m using PM2

               total        used        free      shared  buff/cache   available
Mem:             427         174          82           1         170         200
Swap:           1023         145         878

sdetweil

@nowayto while MagicMirror is running

nowayto

@sdetweil

it’s running

pm2 status

┌────┬────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id │ name   │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
├────┼────────┼─────────────┼─────────┼─────────┼──────────┼────────┼──────┼───────────┼──────────┼──────────┼──────────┼──────────┤
│ 1  │ mag    │ default     │ N/A     │ fork    │ N/A      │ 0      │ 1    │ stopped   │ 0%       │ 0b       │ ber… │ disabled │
│ 0  │ mm     │ default     │ 2.31.0  │ fork    │ 781      │ 55m    │ 0    │ online    │ 0%       │ 808.0kb  │ ber… │ disabled │

free -m

               total        used        free      shared  buff/cache   available
Mem:             427         149          78          29         199         196
Swap:           1023         178         845

sdetweil

@nowayto never seen such a low memory use!!!

nowayto

@sdetweil it’s strange… because I have some modules active

standard Calendar
MMM-CalendarEXT3
standard weather
MMM-Formula1
MMM-Growatt

is it an issue? Everythings seems ok except for startup (sometimes)

sdetweil

@nowayto wow

Might be related to sd card speed

nowayto

@sdetweil it could be. It’s a good card but it could have reached her lifespan. I’ll give it a try, thanks