Memory Utilization — RMCs measure memory traffic occurring at each memory channel or memory controller instance. Data from these RMCs is aggregated to measure the cumulative memory traffic across all the memory channels on the system. This is a measure of memory bandwidth consumption and not amount of memory utilization. iDRAC aggregates it for one minute, so it may or may not match the memory utilization that other OS tools, such as top in Linux, show. Memory bandwidth utilization that the iDRAC shows is an indication of whether workload is memory intensive or not."
To add one comment: I notice Dell says this about the memory stats: "This is a measure of memory bandwidth consumption and not amount of memory utilization. Memory bandwidth utilization that the iDRAC shows is an indication of whether workload is memory intensive or not." (link below) Not sure precisely what this means but it makes me wonder if we are misinterpreting the iDRAC stats.
Thank you @DELL-Young E ! That's it - it was a fundamental misunderstanding of the stats being presented in Dell's iDRAC. I opened a case with Dell this morning and they clarified that the stats show traffic between CPU and memory, not memory utilization, which is basically what the article was saying that you quoted. So, we simply have a memory allocation issue on the hosts we need to resolve. Thanks!
DELL-Young E
Moderator
•
5.4K Posts
0
July 28th, 2021 20:00
Hi, hope this helps:
"
Memory Utilization — RMCs measure memory traffic occurring at each memory channel or memory controller instance. Data from these RMCs is aggregated to measure the cumulative memory traffic across all the memory channels on the system. This is a measure of memory bandwidth consumption and not amount of memory utilization. iDRAC aggregates it for one minute, so it may or may not match the memory utilization that other OS tools, such as top in Linux, show. Memory bandwidth utilization that the iDRAC shows is an indication of whether workload is memory intensive or not."
Tim_1965
1 Rookie
•
35 Posts
0
July 28th, 2021 12:00
To add one comment: I notice Dell says this about the memory stats: "This is a measure of memory bandwidth consumption and not amount of memory utilization. Memory bandwidth utilization that the iDRAC shows is an indication of whether workload is memory intensive or not." (link below) Not sure precisely what this means but it makes me wonder if we are misinterpreting the iDRAC stats.
https://www.dell.com/support/manuals/en-us/idrac9-lifecycle-controller-v3.3-series/idrac_3.30.30.30_ug/monitoring-performance-index-of-cpu-memory-and-input-output-modules?guid=guid-61137907-32af-4f1f-a0f4-e11954e1196a
Tim_1965
1 Rookie
•
35 Posts
0
July 29th, 2021 08:00
Thank you @DELL-Young E ! That's it - it was a fundamental misunderstanding of the stats being presented in Dell's iDRAC. I opened a case with Dell this morning and they clarified that the stats show traffic between CPU and memory, not memory utilization, which is basically what the article was saying that you quoted. So, we simply have a memory allocation issue on the hosts we need to resolve. Thanks!