Java heap space - OutOfMemoryError

hello,
I use version 5.12 of traccar with docker, I constant if I want to generate a report with a lot of data I have an error

Java heap space - OutOfMemoryError

however I still have 4g memory available in my server. I also saw that it is possible to allocate more memory. My question is how do we allocate the memory?
should I add this line below in my config file traccar.xml?

ExecStart=/opt/traccar/jre/bin/java -Xmx2G -jar tracker-server.jar

If not how should I proceed please help me

Have you tried increasing the heap limit?

@Anton Tananaev

how to do this please?

You already provided an example.

in reality I don't know how to integrate, should I put the first or the second in my configuration file?

ExecStart=/opt/traccar/jre/bin/java -Xmx2G -jar tracker-server.jar conf/traccar.xml

or

ExecStart=/opt/traccar/jre/bin/java -Xmx2G -jar tracker-server.jar

You should just add -Xmx2G to whatever is there by default. You can try even higher number. Maybe 3G.

I did as you said and I put 6G because I have enough ram memory on my server, you can see the image captures of my configuration file and my logs. we can see that nothing to change, can you guide me to correct this?

traccar.xml

logs info

The line doesn't go into the Traccar config file. It goes in the service config.

@Anton Tananaev
i use traccar docker , how can access to config traccar service?

In that case the configuration is in the dockerfile.

@Anton Tananaev
thank you, now is ok