It may also depend on the version of Java you're using - depending on the version of Java that you're using, they may or may not properly pick up the cgroup settings vs. the total number of cores available.
I don't know which version(s) of Java work, but I think the later versions have better support. Thanks, Justin Lee On Tue, Nov 7, 2017 at 10:18 AM, deadbrain <[email protected]> wrote: > Thanks Thodoris for you help I will need to check with people managing the > infrastructure to see what parameters are passed to our agents... > > Thanks again for the tips > > Regards > > > > On 11/07/2017 04:10 PM, Thodoris Zois wrote: > >> Hello, >> >> I don't really know if i can help you but i used Docker containers in >> Mesos with isolation and everything was perfect. So are you using Mesos >> containerizer? Did you enable cgroups/mem, cgroups/cpu on each agent? As it >> concerns CPU, cgroups do not limit the anount of CPU if its the only >> running application. In order to limit exactly CPU you need to enable cfs >> on each agent. >> >> Thodoris >> >> On 7 Nov 2017, at 15:28, deadbrain <[email protected]> wrote: >>> >>> Hi all, >>> >>> I expect to be at the right place for my question... >>> >>> We are hosting Java micro services exposed as docker containers (Spring >>> Boot applications inside) inside Mesos.... >>> >>> We face 2 major problems: >>> >>> - hardware isolation (number of cores seen by Java Virtual Machines) >>> makes our applications go crazy because JVM sees all cores and not the only >>> ones given in the Mesos config parameters as a consequence GC heuristics >>> are wrong and some config values in some libraries are false too (Undertow >>> web server spawns 8*number of cores as workers thread pool)... >>> >>> In Linux since the 2.4.19 kernel we have the per process namespace >>> option to limit the hardware vision of any container... What would be the >>> solution on Mesos ? >>> >>> >>> - CPU starvation : some micro services do not seem to have the required >>> CPU time to work, what kind of advices could you give me to have a better >>> understanding regarding this problem.... >>> >>> Statement: we can see very long partial GC times (about 4 seconds) , >>> standard times would be about 50ms.... >>> >>> >>> Thanks for your help >>> >>> Kind regards >>> >>> Jerome >>> >>> >
