Open today's logfile:
atop -r
or open yesterday's logfile:
atop -r y
or open the day before yesterday's logfile:
atop -r yy
or open a specific date:
cd /var/log/atop
atop -r atop_20130927
Then jump forwards and backwards in time with t and T respectively.
Use b then 16:20 to jump to a specific time.
Hit ? to bring up the help.
C – sort in order of cpu consumption (default)
M – sort in order of memory usage
D – sort in order of disk activity
N – sort in order of network activity
A – sort in order of most active resource (auto mode)
The A sorting is great for drawing attention to the current bottleneck. An A will appear next to the column which it has chosen.
These keys change what data is displayed for each process:
g - generic (default)
c - full command line (helps to differentiate different instances of the same executable)
m - memory
d - disk
n - network
s - scheduling
v - various
e - GPU usage
Instead of processes, you can display:
u - accumulate process data by user
u - accumulate process data by process name
j - accumulate process data by docker container
y - break process into individual threads
Y - sort the threads in y view