I have “java.lang.OutOfMemoryError: Java heap space” messages in the logs
The quantity of memory allocated to Ubooquity depends on the hardware your are running it on. If this quantity is too small, you might sometime saturate it with when performing memory intensive operations. That’s when you get java.lang.OutOfMemoryError: Java heap space errors.
To fix the problem, you can explicitly set the amount of memory Ubooquity is allowed to use (be careful to set a value lower than the actual physical memory of your hardware).
The default value in DietPi for Ubooquity Java process is 768MB. You could raise this value to 1GB, but because you are using a RPi 3 which has only 1GB RAM available, you could make the system unresponsive if the java process needs the whole 1GB.
Different from the Ubooquity docs you had to do this in the config of the service, bc it’s started as a systemd service in DietPi.
So until the import of books is still working, I wouldn’t change anything
I am also having these errors, running dietpi in a VM, and some books are not importing, and performance is sluggish.
Ubooquity system info shows the following:
Ubooquity version: 2.1.2 built on 2018-10-14 at 12:58
Java version: 17.0.2
Java vendor: Debian
Java VM name: OpenJDK 64-Bit Server VM
OS name: Linux
OS version: 5.10.0-13-amd64
OS architecture: amd64
Number of processors: 2
Max memory: 193 MB
Free memory: 92 MB
Total memory: 193 MB
Why is memory so low? How can I increase it?
At the moment, I have 1Gb attached to the VM, but I can increase it if necessary.
root@DietPi:/etc# free -h
total used free shared buff/cache available
Mem: 943Mi 558Mi 82Mi 27Mi 302Mi 222Mi
Swap: 1.5Gi 0.0Ki 1.5Gi