CPU utilization in microservices-v2021 traces

[mutinifni]

There are two CPU utilization numbers in the microservices traces:

1. node

columns	Example Entry
timestamp	1000
nodeid	ff1fb31957db767c5be4de2855488f128532efc2df0a673c6fa3e7718d10f355
cpu_utilization	0.7236219289416774
memory_utilization	0.738378997619996

2. MS_Metrics_table

columns	Example Entry
timestamp	0
msname	99f2e7b501f50db9b4089242a5d3e1aba334c32e0c718b8d79281529a9489b15
msinstanceid	4d1cf65970444ef3ba9870468d7ecf9c17a93782134464767fbdc4aeb6f162eb
nodeid	ecd8a876344d673d8e934f566aae38aec05e572d43ab8d58624bd59e3ec43928
cpu_utilization	0.1299166666654249
memory_utilization	0.6126489639282227

For both of these, what do the utilization numbers mean?

For example, if the utilization is 1, how many cores / CPUs are being utilized? Does it mean the same for both the tables? How many CPUs does a container have in comparison to the full node?

Consider this specific case:

• MS Container has 8 CPUs allocated with utilization 0.5
• It is running on a node that has 16 CPUs

Then does it mean mean the full container is being used? or only 4 CPUs are being used? Is it possible to know the size of the container?

Thanks!

[niewuya]

Thanks for the questions and your interest!

One node has multiple containers. One node has multiple containers. CPU utilization in the node and MS_Metrics quantify the CPU usage in nodes and containers, respectively. So, in the specific case you mentioned, only 4 CPUs are being used by MS container.

Nodes and containers could have different configurations, such as the number of CPU cores and the size of memory. The released traces do not provide such information.

[mutinifni]

Makes sense, thank you!