I recently did some research again, and stumbled upon this. Before crying about it to the OpenJDK team, I wanted to see if anyone else has observed this, or disagrees with my conclusions. So, it's...

I recently started learning docker and it seems that most of the heavy lifting is done by the Linux kernel, using namespaces and cgroups. A few things which I am finding confusing are: What is the...

I'm using cgget -n --values-only --variable memory.limit_in_bytes / inside a Docker container to see how much memory it is allowed to use as per docker run --memory=X. However, I need to know wheth...

I need to run real time applications on Ubuntu RT Linux and was reading about ways to make linux act as RT system and I learned two ways to do it preemptive_rt kernel patching enabling CONFIG_RT_...

I'm using centos6/7 and using cgroup to manage cpu resources. I have read through the RHEL document but have no answer to my question below: If I set both cfs_quota_us and shares among cgroups, th...

I'm running a Java program inside a Docker container that has a hard memory limit of 4GB. I've set the max heap to 3GB but still the Java program exceeds the limit and gets killed (OOMKilled). My ...

This is in reference to https://docs.docker.com/config/containers/resource_constraints/#limit-a-containers-access-to-memory. I have already created working containers, running Docker version 18.05....

UPDATE: found a lot of questions and discussions on stackoverflow about this topic. And although they are marked as accepted answered and started by thousands of users, they do not seem to be the ...

I've been running Kafka on Kubernetes without any major issue for a while now; however, I recently introduced a cluster of Cassandra pods and started having performance problems with Kafka. Even t...

My current configs are: > cat /proc/sys/vm/panic_on_oom 0 > cat /proc/sys/vm/oom_kill_allocating_task 0 > cat /proc/sys/vm/overcommit_memory 1 but when I run a task, it's killed a...

i have a question regarding cgroups, especially considering isolation. Wikipedia states, that you can use cgroups to isolate groups, so that there are "separate namespaces for groups, so they don'...

Consider the following, which runs sleep 60 in the background and then exits: $ cat run.sh sleep 60& ps echo Goodbye!!! $ docker run --rm -v $(pwd)/run.sh:/run.sh ubuntu:16.04 bash /run.sh P...

The resource limit of Pod has been set as: resource limit cpu: 500m memory: 5Gi and there's 10G mem left on the node. I've created 5 pods in a short time successfully, and the node maybe sti...

I am using docker to containerize bunch of services. Some times, containerized services heavily swaps. I've changed vm.swappiness to 1 via sysctl on my host system. But docker's memory cgroup still...

I've applied a cgroups rule to a specific user, and I'd like to test whether memory of the programs running from the above user has been limited as expected. I tried with the following script: imp...

What is the difference between KVM and Linux Containers (LXCs)? To me it seems, that LXC is also a way of creating multiple VMs within the same kernel if we use both "namespaces" and "control group...

We use cgroup limit procedure use more resource。 but，when Memory is more than limit in cgroup，it will kill process。 Why cgroup’s memory subsystem use oom-killer instead of return memory allocation ...

I am getting this warning from 'sudo docker -d': WARNING: Your kernel does not support cgroup swap limit. even after following the steps (as in this link): modify below lines in /etc/default...

I am trying to use cgroups in order to limit the CPU usage. I am using this guide https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Resource_Management_Guide/sec-cpu_an...

I am trying to modify the real-time runtime parameter of a docker container process within a cgroup. I am following this tutorial: http://www.breakage.org/2014/08/22/using-sched_fifo-in-docker-cont...

I tried the example from the cpuset(7) manual and created a cpuset Charlie. On both Ubuntu 14.4 LTS and SLES 12 I get the following error when trying to put the current process into the cpuset: /d...

I am new to cgroup. I want to use cgroup to bind Qemu to some CPUs. I am working on Ubuntu 12.04.3 with my own compiled kernel 3.11.0+. Below is some output of my commands. root@xiao-laptop:~/taml...

I'm trying to set absolute limits on Docker container CPU usage. The CPU shares concept (docker run -c <shares>) is relative, but I would like to say something like "let this container use at...

I am running tor on a small OpenWRT router, where swapping can't be avoided due to the limited amount of ram available (32mb). Most of the time the router doesn't do anything else, however from t...

Is there any way to use LXC for resource management using process groups without creating containers? I am working on a service that runs arbitrary code inside a sandbox, for which I am only intere...