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Is there a way to just display a given days averages using sar. I currently do something like the following:

sar -u -s 00:00:00 -e 23:59:59 -f /var/log/sysstat/sa10

And just take the last (average) line to add to a report. But it would be nice and easy to just gen my report if I could pass an argument to just spit-out the average. I could not find such an option in the sar documentation. So, unless I am missing it, I am guessing the option is no. However, It's very possible I'm missing it or there might be another tool other than sar that might expose this functionality.

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    Is this is what you are looking for? sar -u -s 00:00:00 -e 23:59:59 -f /var/log/sysstat/sa10 | tail -1 Commented Apr 28, 2014 at 1:52
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    @Ramesh - write that up as an A. That's the way to do it. Commented Apr 28, 2014 at 2:54

3 Answers 3

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You can find the average by piping the tail command to your command. By this way, your command will always return only one line. 

sar -u -s 00:00:00 -e 23:59:59 -f /var/log/sysstat/sa10 | tail -1
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Not using sar...but there are accounting utilities in that package that will help you on a given days' worth of SAR output. This is usually installed as a crontab entry (commented out) running as adm or sys sometimes as root. In later linux versions, it is installed as /etc/cron.d/sysstat. Look at the sa1 and sa2 commands. They are /usr/lib64/sa/sa1 and sa2 and work as a team. sa1 stores data in binary form when called and sa2 takes the binary file from sa1 and generates a textual report containing the averages.

There is ample information on this scheme, just do an appropriate google search like 'linux sa utilities'.

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Using tail requires you to know how many lines you anticipate of average statistics. If you want average stats for each cpu and you have used -P ALL then the tail command is cumbersome.

I suggest simply grep'ing for Average. To get the header, which is a comment inserted by sadc, you need to add the -C option:

# sar -P ALL -C | grep Average: Average: CPU %user %nice %system %iowait %steal %idle Average: all 3.06 0.00 1.22 0.00 0.00 95.72 Average: 0 0.55 0.00 0.23 0.01 0.00 99.21 Average: 1 1.96 0.00 0.77 0.00 0.00 97.26 Average: 2 3.84 0.00 1.63 0.00 0.00 94.52 Average: 3 0.59 0.00 0.24 0.00 0.00 99.17 Average: 4 0.51 0.00 0.27 0.01 0.00 99.21 Average: 5 1.78 0.00 0.74 0.01 0.00 97.47 Average: 6 8.02 0.00 3.16 0.01 0.00 88.81 Average: 7 6.75 0.00 2.61 0.00 0.00 90.64 Average: 8 10.93 0.00 4.20 0.01 0.00 84.86 Average: 9 6.47 0.00 2.54 0.01 0.00 90.98 Average: 10 9.76 0.00 3.72 0.02 0.00 86.50 Average: 11 5.42 0.00 2.03 0.01 0.00 92.54 Average: 12 0.07 0.00 0.05 0.00 0.00 99.89 Average: 13 0.31 0.00 0.18 0.00 0.00 99.51 Average: 14 0.02 0.00 0.21 0.00 0.00 99.78 Average: 15 0.06 0.00 0.08 0.00 0.00 99.86 Average: 16 0.14 0.00 0.07 0.00 0.00 99.79 Average: 17 0.03 0.00 0.04 0.00 0.00 99.93 Average: 18 8.03 0.00 3.16 0.00 0.00 88.80 Average: 19 1.41 0.00 0.56 0.00 0.00 98.02 Average: 20 2.62 0.00 1.06 0.00 0.00 96.32 Average: 21 0.37 0.00 0.16 0.00 0.00 99.47 Average: 22 0.07 0.00 0.04 0.00 0.00 99.89 Average: 23 3.66 0.00 1.43 0.00 0.00 94.90
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