Greetings!
I have the node red dashboard running on a raspberrypi 3b with a 7" touchscreen
Mir-kiosk with wpe-webkit and the node-red-rpi snap by @ogra
unbuntu core 18
Everything is great until I let it run for a day. For some reason the display began show a strange decaying of the graphics on the dashboard after running for 24hrs or so (see attached image).
I’m assuming this must be a memory issue. I would like to try and impose some garbage collection. Any ideas where I start with that?
Thanks!
I believe the several hundred lines in a row like this in the logs verify my suspicions.
Jun 24 19:08:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 338993152/339124224/131072, res+swap = 422076416/422207488/131072
Jun 24 19:09:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 339288064/339398656/110592, res+swap = 422371328/422481920/110592
Jun 24 19:09:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 339431424/339677184/245760, res+swap = 422514688/422760448/245760
Jun 24 19:10:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 339914752/340054016/139264, res+swap = 422998016/423137280/139264
Jun 24 19:10:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 341123072/341143552/20480, res+swap = 424206336/424226816/20480
Jun 24 19:11:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 345059328/345309184/249856, res+swap = 428142592/428392448/249856
Jun 24 19:11:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 342491136/342601728/110592, res+swap = 425574400/425684992/110592
Jun 24 19:12:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 343031808/343166976/135168, res+swap = 426115072/426250240/135168
Jun 24 19:12:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 340381696/340516864/135168, res+swap = 423464960/423600128/135168
Jun 24 19:13:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 340832256/340963328/131072, res+swap = 423915520/424046592/131072
Jun 24 19:13:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 341999616/342011904/12288, res+swap = 425082880/425095168/12288
Jun 24 19:14:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 344907776/344907776/0, res+swap = 427991040/427991040/0
Jun 24 19:14:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 351313920/351371264/57344, res+swap = 431763456/431820800/57344
Jun 24 19:15:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 345010176/345194496/184320, res+swap = 425459712/425644032/184320
Jun 24 19:15:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 345247744/345341952/94208, res+swap = 425697280/425791488/94208
Jun 24 19:16:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 344641536/344809472/167936, res+swap = 425091072/425259008/167936
Jun 24 19:16:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 341344256/341504000/159744, res+swap = 421793792/421953536/159744
Jun 24 19:17:09 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 341295104/341303296/8192, res+swap = 421744640/421752832/8192
Jun 24 19:17:39 localhost wpe-webkit-mir-kiosk.browser[1231]: Memory pressure relief: Total: res = 341413888/341549056/135168, res+swap = 421863424/421998592/135168
ogra
June 25, 2020, 8:04am
3
This is interesting, since i started with the node-red-rpi snap i have a similar setup running here (3b+ 7" screen (not touch and via config.txt set to 1080p)) and do not see such issues … i’m wondering if some javascript of your dashboard goes wild here … (my setup does pretty much just use the default gauges and graphs with no modificatons)
you should probably start with:
Ubuntu Core images come with everything needed to enable swap, but it’s disabled by default. To enable it:
edit /etc/default/swapfile and set SIZE to a non-zero value (e.g. 512 for 512MB).
sudo systemctl enable --now swapfile.service
That’s all that’s needed.
Now some more details:
/etc/default/swapfile is writable, but some editors might be confused by its directory being readonly. The provided vi is fine with it though.
If SIZE is zero, even if the service is enabled and started, no swa…
though this will indeed most likely just postpone the issue a bit.
