How to read several days log files when use `atopsar`?

Question

My system is centos 7.4 with atop-2.3.0-8.el7.x86_64.
I already have 3 days log in var/log/atop, such as atop_20190312 atop_20190313 atop_20190314.

I want to find out the peak period of CPU consumption in those 3 days.
Based on this post,I tried:

atopsar -r /var/log/atop/ -A -R 3 -c |head

but failed.

How to read several days atop log into one?

score 1 · Answer 1 · answered Mar 14 '19 at 17:56

1

I am sorry to say that as I know, atopsar is not able to combine several days.

Selection the date:

You can use -r to directly read one atop-log file. If you need to check yesterday or the day before, you can use -r y. If you add y you can select even older days: -r yy would be the day before yesterday.

Selection the right report

You can either select all reports with -A or select for example CPU only with -c. Selecting both doesn't make sense.

Conclusion

Since you want to see the cpu utilization for 3 days, you can see them:

Today: 
# atopsar  -R 3 -c |head

Yesterday:
# atopsar -r y -R 3 -c |head

2 Days ago:
# atopsar -r y -R 3 -c |head

Hope that helps.

answered Mar 14 '19 at 17:56

Daniel Andersen

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If only one day range, I am sad that's not `statistics` – kittygirl Mar 15 '19 at 00:25
what's the meaning of `-R 3` of `atopsar -R 3 -c |head` ? – kittygirl Mar 15 '19 at 00:43
Hi @kittygirl . You started with `-R 3` in your question. It means: Summarize 3 samples into one sample. Please consult the man pages or https://linux.die.net/man/1/atopsar for more details. – Daniel Andersen Mar 15 '19 at 12:20
seemed something wrong with your answer `2 days ago # atopsar -r y` – kittygirl Mar 16 '19 at 02:57
Have a look at `https://superuser.com/questions/599464/graphing-atop-logs/708127?noredirect=1#comment2135038_708127` – kittygirl Mar 16 '19 at 11:36

How to read several days log files when use `atopsar`?

1 Answers1