What is the difference between mem_reserved and mem_usage in impala charts?

[#1]

Hi, 

I am trying to create a dashboard  in CM with impala charts in order to see the maximum memory of impala and the one that my queries are using.

I running tsquery for 

total_impala_admission_controller_local_backend_mem_reserved_across_impala_daemon_pools

and

total_impala_admission_controller_local_backend_mem_usage_across_impala_daemon_pools

But it seems that the charts are representing exactly the same thing. Why is this happens? 

[#2 · Accepted solution]

Hello @drgenious,

Please check the below link [0].

[0]https://docs.cloudera.com/documentation/enterprise/6/6.3/topics/cm_metrics_impala_daemon_resource_po...