Inside the system: resources, kernel, processes

Quiz: CPU, memory and OOM

Question 1 of 8

The load average and the R and D states, the CPU queue in vmstat, the nice priority, the free -h columns, the OOM killer within a service memory ceiling and drop-ins. The questions follow the lessons “Load average and CPU load” and “Memory, swap and the OOM killer”.

8 questions · threshold 70%

Read the output

What is happening on this machine?

$ nproc
1
$ top -bn1 | head -3
top - 09:14:02 up 2 days,  2 users,  load average: 3.35, 0.74, 0.24
Tasks: 112 total,   2 running, 110 sleeping,   0 stopped,   0 zombie
%Cpu(s):  9.1 us,  0.0 sy,  0.0 ni, 90.9 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st

The CPU is overloaded — the load is above three on one CPU.
Several processes recently got stuck waiting for a disk or a filesystem — in the D state.
Three users logged in, and uptime counted them in the load average.
A false alarm — the CPU is free, so everything is fine.

A–D or ↵ Sign in to answer