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SignalK / signalk-java

Installer and web-app for the artemis-server (a java based Signal K master server)
Apache License 2.0
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Char loading fails for large charts on RPi 3 #5

Closed RBerliner closed 5 years ago

RBerliner commented 8 years ago

I have discovered that Chartloading fails for the RPI 3 when the zip file is large ( > 100 MB) but works OK when the file size is small (< 10 MB).

I now report that when running SignalK on my Lubuntu laptop, the large files will load OK. This suggests that the problem is connected to the RPi execution and not the SignalK code. Out of memory?

Ron

rob42 commented 8 years ago

Yes, quite likely. But it still needs to work, so needs attention. Ive looked at the code, it should be streaming to temp file, then copying, not staying in RAM. I need to look again.

Rob

November 27 2016 3:27 PM, "Ron Berliner" wrote: I have discovered that Chartloading fails for the RPI 3 when the zip file is large ( > 100 MB) but works OK when the file size is small (< 10 MB).

I now report that when running SignalK on my Lubuntu laptop, the large files will load OK. This suggests that the problem is connected to the RPi execution and not the SignalK code. Out of memory?

Ron

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RBerliner commented 8 years ago

I believe that I have found a solution to the problem of large chart loading failures.

I added the line:

export MAVEN_OPTS="-Xms1024m -Xmx1024m -XX:PermSize=1024m"

to the bottom of .bashrc on the RPi according to the instructions here: http://docs.alfresco.com/4.2/tasks/dev-extensions-maven-sdk-maven-opts.html

SignalK uses the same Java VM and options as mvn when run from "mvn exec:java"

On my RPi 3, the command free gives:

pi@pi:~ $ free total used free shared buffers cached Mem: 947740 305752 641988 8608 5976 201328 -/+ buffers/cache: 98448 849292 Swap: 102396 18020 84376

I am using a 32 GB SD card.

When mvn exec:java starts up it complains that PermSize support was removed but otherwise proceeds.

"Java HotSpot(TM) Client VM warning: ignoring option PermSize=1024m; support was removed in 8.0"

I was then able to load NOAA 11552_1 (107 MBytes) which failed before. It displays too!