How to calculate Heap and RAM requirements for Kafka Backup

[itadventurer]

seems -Xmx1024M or Docker memory_limit=1152M is not enough for this cluster :( Any ideas about how to calculate HEAP/RAM size for kafka-backup?

I have currently no idea how to calculate this – let us discuss how to approximate the Heap and Memory usage.

[jay7x]

Some stats JFYI:

USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root     103012  117 57.3 4737912 2304136 ?     Ssl  08:43  75:50 /opt/java/openjdk/bin/java -Xms256M -Xmx2048M [...]

UPD 1:
with -Xmx 1024M on same cluster I got OOM:

Exception in thread "qtp99042020-21" java.lang.OutOfMemoryError: Java heap space

UPD 2:
it's running fine again with -Xmx1536M

UPD 3:
failed after few weeks with OOM, so increased it to 2048M again..