RAM memory for Cesium+

I installed a new test node Cesium+, with docker.

But, I see memory usage in more than 5 GB.

Is this normal?

Thanks.

ElasticSearch has been written in Java.
The JVM memory is reserved when startup, and should changes at lot when running. Two env variables can be set, before launching : for min and for max memory usage.
I dont know the ES default value, but you can check in shell script files (under cesium-pm lus-pod/bin folder)