Cloudera 7.4.4 - Yarn - Questions about Queues

[#1]

Hello.

In Yarn Queue Manager, there is 4 queues defined :

but when we submit queries (using Hue or SAS Software to load data), only the default queue is used.

And we can go very high :

From what we undestand, Default queue is defined for using 20% of the cluster but can use up to 100%, so 70% is normal.

But our cluster is 365 GB / 15 vCores and some applications can use more :

7 / 7 / 6 / 5 / 3 vCores in the graph = 28 vCore !

How is it possible ?

Thanks for your help

[#2 · Accepted solution]

The application ask for container run some part in that container and then release it back.
So the 28 vcores that you are seeing is due to that.

Let's say your job asks for 4 containers and eack with 7 vcores so at first only two containers will run as you have limit of 15 vcores. but if one container is released then that job will take another container with 7 vcores so in total now the number of vcores used is 21.