Putting all cores won't solve the purpose alone, you'll have to mention executors as well executor memory accordingly to it..
On Tue 27 Feb, 2018, 12:15 AM Vadim Semenov, <va...@datadoghq.com> wrote: > All used cores aren't getting reported correctly in EMR, and YARN itself > has no control over it, so whatever you put in `spark.executor.cores` will > be used, > but in the ResourceManager you will only see 1 vcore used per nodemanager. > > On Mon, Feb 26, 2018 at 5:20 AM, Selvam Raman <sel...@gmail.com> wrote: > >> Hi, >> >> spark version - 2.0.0 >> spark distribution - EMR 5.0.0 >> >> Spark Cluster - one master, 5 slaves >> >> Master node - m3.xlarge - 8 vCore, 15 GiB memory, 80 SSD GB storage >> Slave node - m3.2xlarge - 16 vCore, 30 GiB memory, 160 SSD GB storage >> >> >> Cluster Metrics >> Apps SubmittedApps PendingApps RunningApps CompletedContainers RunningMemory >> UsedMemory TotalMemory ReservedVCores UsedVCores TotalVCores ReservedActive >> NodesDecommissioning NodesDecommissioned NodesLost NodesUnhealthy >> NodesRebooted >> Nodes >> 16 0 1 15 5 88.88 GB 90.50 GB 22 GB 5 79 1 5 >> <http://localhost:8088/cluster/nodes> 0 >> <http://localhost:8088/cluster/nodes/decommissioning> 0 >> <http://localhost:8088/cluster/nodes/decommissioned> 5 >> <http://localhost:8088/cluster/nodes/lost> 0 >> <http://localhost:8088/cluster/nodes/unhealthy> 0 >> <http://localhost:8088/cluster/nodes/rebooted> >> I have submitted job with below configuration >> --num-executors 5 --executor-cores 10 --executor-memory 20g >> >> >> >> spark.task.cpus - be default 1 >> >> >> My understanding is there will be 5 executore each can run 10 task at a >> time and task can share total memory of 20g. Here, i could see only 5 >> vcores used which means 1 executor instance use 20g+10%overhead ram(22gb), >> 10 core(number of threads), 1 Vcore(cpu). >> >> please correct me if my understand is wrong. >> >> how can i utilize number of vcore in EMR effectively. Will Vcore boost >> performance? >> >> >> -- >> Selvam Raman >> "லஞ்சம் தவிர்த்து நெஞ்சம் நிமிர்த்து" >> > >
