Questions[atop](server)

I parse atop inside my Java application to get system load, network speed and so forth. Recently I started deploying my app using docker containers. When I ssh in to the docker and run the atop, I notice (shown on attached image) atop shows sp 0 Mbps which suppose to show sp 1000 Mbps.

I started the container with --privileged and all the containers runs on its own network that was created by docker network create xconvert-net. Is there anything I can do to allow containers to see the correct network link speed?

atop on host

atop on docker

I have PCP (Performance Co-Pilot) recording performance metrics on a RHEL 7 host. The recording cadence is set to Y seconds here:

/etc/pcp/pmlogger/control.d/local

When I copy the performance metrics logs to another machine I'm able to analyze the files using:

pcp atop --interval=Zs -r /path/to/archive/files/

(where Z is a value that may or may not be the same as Y)

When I jump around in the archive using the t and T commands I move by Z seconds, which makes sense.

My question is about the calculated values that pcp atop displays. According to man pcp-atop, values such as CPU utilization percentage and system memory utilization percentage are calculated over the past "interval", but it's unclear whether that interval is the capture interval or the display interval for replayed data.

I am on CentOS 7 and using atop v2.6.0

If I run atop manually with the following command everything runs as expected and the log is written to every 10 seconds:

/usr/bin/atop -w /var/log/atop/atop_20210320 10

However when running atop as a service with systemd the log is only written to once when the service starts and never updated.

I can confirm via ps -ef that the service has initiated the command and it's running:

root 2320 1 0 13:34 ? 00:00:00 /usr/bin/atop -w /var/log/atop/atop_20210320 10

Any help would be much appreciated. Thank you.

After investigating a load spike on my CentOS 7 server, I ran atop and noticed something odd. It is reporting MDD for my logical volume (md127) maxed out at 100% all the time.

The other disk tests I ran seemed fine. It is a RAID1 config with two 500G SD drives. Any suggestions why this might be? It looks like it has been this way for a while.

[root@ds2 ~]# cat /proc/mdstat
Personalities : [raid1]
md126 : active raid1 sdb3[2] sda3[0]
      1049536 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md127 : active raid1 sda2[0] sdb2[2]
      478291968 blocks super 1.2 [2/2] [UU]
      bitmap: 3/4 pages [12KB], 65536KB chunk

unused devices: <none>

Header lists all CPUs/cores and keeps re-sizing as I go back in time with t and T. I read though the help and tried searching.

How to hide that header?