Mesos/Marathon Memory usage limits for Docker - docker

Question

We are created a wordpress container using mesos-Marathon, we allocated 0.1 CPU and 64mb RAM.
When we check the docker stats, we observed that memory allocations we differed with what we are allocated in marathon,
Is there any way to update memory usage limit for Docker container, can we set up any default limits for all containers at demon level.(By Mesos / Docker demon level)
We try do load test on WordPress site, container got killed for just 500 connections, we try to do load test using JMeter.
Thanks in Advance

Answer 1

Docker doesn't have a memory option for your docker daemon yet. As to what is the default memory limit for containers you can only set limits at runtime (not after runtime) with the following options:
-m, --memory="" Memory limit
--memory-swap="" Total memory (memory + swap), '-1' to disable swap
As per this
I also see that there's still in issue open here. Make sure you are using Mesos (0.22.1) or later.
How about creating your containers with something like this Marathon request?
curl -X POST -H "Content-Type: application/json" http://<marathon-server>:8080/v2/apps -d#helloworld.json
helloworld.json:
{
"id": "helloworld",
"container": {
"docker": {
"image": "ubuntu:14.04"
},
"type": "DOCKER",
"volumes": []
},
"cmd": "while true; do echo hello world; sleep 1; done",
"cpus": 0.1,
"mem": 96.0, # Update the memory here.
"instances": 1
}