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I am using a Cassandra docker (official Cassandra docker) to setup my local env.
As part of this I want to limit the amount of memory the Cassandra is using in my local deployment.
By default Cassandra has a pre defined way to set its memory.
I found references to some info saying that i can use JVM_OPTS to set this values but it does not seem to take hold.
I am looking for a way to set up this values without creating my own Cassandra docker.
Docker command that is used to run container:
docker run -dit --name sdc-cs --env RELEASE="${RELEASE}" \
--env CS_PASSWORD="${CS_PASSWORD}" --env ENVNAME="${DEP_ENV}" \
--env HOST_IP=${IP} --env JVM_OPTS="-Xms1024m -Xmx1024m" \
--log-driver=json-file --log-opt max-size=100m \
--log-opt max-file=10 --ulimit memlock=-1:-1 --ulimit nofile=4096:100000 \
--volume /etc/localtime:/etc/localtime:ro \
--volume ${WORKSPACE}/data/CS:/var/lib/cassandra \
--volume ${WORKSPACE}/data/environments:/root/chef-solo/environments \
--publish 9042:9042 --publish 9160:9160 \
${PREFIX}/sdc-cassandra:${RELEASE} /bin/s
Any advice will be appreciated!
648
Set Maximum Memory Access To limit the maximum amount of memory usage for a container, add the --memory option to the docker run command. Alternatively, you can use the shortcut -m . Within the command, specify how much memory you want to dedicate to that specific container.
Cassandra automatically calculates the maximum heap size (MAX_HEAP_SIZE) based on this formula: max(min(1/2 ram, 1024MB), min(1/4 ram, 8GB) For production use, you may wish to adjust heap size for your environment using the following guidelines: Heap size is usually between ¼ and ½ of system memory.
I am using docker-compose, in the docker-compose.yml file I set the following env variables. It seems to work.
environment:
- HEAP_NEWSIZE=128M
- MAX_HEAP_SIZE=2048M
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