default rollup for cumulative counters is delta
@@ -163,9 +163,9 @@ The primary metrics for container CPU limits are:
100,000 microseconds.
The first two metrics are cumulative counters that keep growing, so the easiest
-way to use them is to look at how much they change per second (the default
-rollup when you look at the metrics in SignalFx). The second two are gauges
-and generally don't change for the lifetime of the container.
+way to use them is to look at how much they change per second using `rate` rollup
+(default is `delta` when you look at the metrics in SignalFx). The second two are
+gauges and generally don't change for the lifetime of the container.
The maximum percentage of time a process can execute in a given second is equal
to `container_spec_cpu_quota`/`container_spec_cpu_period`. For example, a
@@ -198,7 +198,7 @@ time-sensitive its workload is.
To monitor case #1, you can use the formula
-`(container_cpu_usage_seconds_total/10000000)/(conatiner_spec_cpu_quota/container_spec_cpu_period)`
+`(container_cpu_usage_seconds_total/10000000)/(container_spec_cpu_quota/container_spec_cpu_period)`
to get the percentage of CPU used compared to the limit (0 - 100+). This value
can actually exceed 100 because the sampling by the agent is not on a perfectly
@@ -207,11 +207,10 @@ exact interval.
For case #2 you need to factor in the `container_cpu_cfs_throttled_time`
metric. The above metric showing usage relative to the limit will be under 100
in this case but that doesn't mean throttling isn't happening. You can simply
-look at `container_cpu_cfs_throttled_time` using its default rollup of
-`rate/sec` which will tell you the raw amount of time a container is spending
-throttled. If you have many processes/threads in a container, this number
-could be very high. You could compare throttle time to usage time with the
-formula
+look at `container_cpu_cfs_throttled_time` using the rollup of `rate` which
+will tell you the raw amount of time a container is spending throttled.
+If you have many processes/threads in a container, this number could be very
+high. You could compare throttle time to usage time with the formula
`container_cpu_cfs_throttled_time/container_cpu_usage_seconds_total`
