diff --git a/sources/tech/20190905 How to Get Average CPU and Memory Usage from SAR Reports Using the Bash Script.md b/sources/tech/20190905 How to Get Average CPU and Memory Usage from SAR Reports Using the Bash Script.md new file mode 100644 index 0000000000..c53b7440e3 --- /dev/null +++ b/sources/tech/20190905 How to Get Average CPU and Memory Usage from SAR Reports Using the Bash Script.md @@ -0,0 +1,232 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (How to Get Average CPU and Memory Usage from SAR Reports Using the Bash Script) +[#]: via: (https://www.2daygeek.com/linux-get-average-cpu-memory-utilization-from-sar-data-report/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +How to Get Average CPU and Memory Usage from SAR Reports Using the Bash Script +====== + +Most Linux administrator monitor system performance with **[SAR report][1]** because it collect performance data for a week. + +But you can easily extend this to four weeks by making changes to the “/etc/sysconfig/sysstat” file. + +Also, this period can be extended beyond one month. If the value exceeds 28, the log files are placed in multiple directories, one for each month. + +To extend the coverage period to 28 days, make the following change to the “/etc/sysconfig/sysstat” file. + +Edit the sysstat file and change HISTORY=7 to HISTORY=28. + +In this article we have added three bash scripts that will help you to easily view each data file averages in one place. + +We have added many useful shell scripts in the past. If you want to check out that collection, go to the link below. + + * **[How to automate daily operations using shell script][2]** + + + +These scripts are simple and straightforward. For testing purposes, we have included only two performance metrics, namely CPU and memory. + +You can modify other performance metrics in the script to suit your needs. + +### Script-1: Bash Script to Get Average CPU Utilization from SAR Reports + +This bash script collects the CPU average from each data file and display it on one page. + +Since this is a month end, it shows 28 days data for August 2019. + +``` +# vi /opt/scripts/sar-cpu-avg.sh + +#!/bin/sh + +echo "+----------------------------------------------------------------------------------+" +echo "|Average: CPU %user %nice %system %iowait %steal %idle |" +echo "+----------------------------------------------------------------------------------+" + +for file in `ls -tr /var/log/sa/sa* | grep -v sar` + +do + +dat=`sar -f $file | head -n 1 | awk '{print $4}'` + +echo -n $dat + +sar -f $file | grep -i Average | sed "s/Average://" + +done + +echo "+----------------------------------------------------------------------------------+" +``` + +Once you run the script, you will get an output like the one below. + +``` +# sh /opt/scripts/sar-cpu-avg.sh + ++----------------------------------------------------------------------------------+ +|Average: CPU %user %nice %system %iowait %steal %idle | ++----------------------------------------------------------------------------------+ +08/01/2019 all 0.70 0.00 1.19 0.00 0.00 98.10 +08/02/2019 all 1.73 0.00 3.16 0.01 0.00 95.10 +08/03/2019 all 1.73 0.00 3.16 0.01 0.00 95.11 +08/04/2019 all 1.02 0.00 1.80 0.00 0.00 97.18 +08/05/2019 all 0.68 0.00 1.08 0.01 0.00 98.24 +08/06/2019 all 0.71 0.00 1.17 0.00 0.00 98.12 +08/07/2019 all 1.79 0.00 3.17 0.01 0.00 95.03 +08/08/2019 all 1.78 0.00 3.14 0.01 0.00 95.08 +08/09/2019 all 1.07 0.00 1.82 0.00 0.00 97.10 +08/10/2019 all 0.38 0.00 0.50 0.00 0.00 99.12 +. +. +. +08/29/2019 all 1.50 0.00 2.33 0.00 0.00 96.17 +08/30/2019 all 2.32 0.00 3.47 0.01 0.00 94.20 ++----------------------------------------------------------------------------------+ +``` + +### Script-2: Bash Script to Get Average Memory Utilization from SAR Reports + +This bash script will collect memory averages from each data file and display it on one page. + +Since this is a month end, it shows 28 days data for August 2019. + +``` +# vi /opt/scripts/sar-memory-avg.sh + +#!/bin/sh + +echo "+-------------------------------------------------------------------------------------------------------------------+" +echo "|Average: kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty |" +echo "+-------------------------------------------------------------------------------------------------------------------+" + +for file in `ls -tr /var/log/sa/sa* | grep -v sar` + +do + +dat=`sar -f $file | head -n 1 | awk '{print $4}'` + +echo -n $dat + +sar -r -f $file | grep -i Average | sed "s/Average://" + +done + +echo "+-------------------------------------------------------------------------------------------------------------------+" +``` + +Once you run the script, you will get an output like the one below. + +``` +# sh /opt/scripts/sar-memory-avg.sh + ++--------------------------------------------------------------------------------------------------------------------+ +|Average: kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit kbactive kbinact kbdirty | ++--------------------------------------------------------------------------------------------------------------------+ +08/01/2019 1492331 2388461 61.55 29888 1152142 1560615 12.72 1693031 380472 6 +08/02/2019 1493126 2387666 61.53 29888 1147811 1569624 12.79 1696387 373346 3 +08/03/2019 1489582 2391210 61.62 29888 1147076 1581711 12.89 1701480 370325 3 +08/04/2019 1490403 2390389 61.60 29888 1148206 1569671 12.79 1697654 373484 4 +08/05/2019 1484506 2396286 61.75 29888 1152409 1563804 12.75 1702424 374628 4 +08/06/2019 1473593 2407199 62.03 29888 1151137 1577491 12.86 1715426 371000 8 +08/07/2019 1467150 2413642 62.19 29888 1155639 1596653 13.01 1716900 372574 13 +08/08/2019 1451366 2429426 62.60 29888 1162253 1604672 13.08 1725931 376998 5 +08/09/2019 1451191 2429601 62.61 29888 1158696 1582192 12.90 1728819 371025 4 +08/10/2019 1450050 2430742 62.64 29888 1160916 1579888 12.88 1729975 370844 5 +. +. +. +08/29/2019 1365699 2515093 64.81 29888 1198832 1593567 12.99 1781733 376157 15 +08/30/2019 1361920 2518872 64.91 29888 1200785 1595105 13.00 1784556 375641 8 ++-------------------------------------------------------------------------------------------------------------------+ +``` + +### Script-3: Bash Script to Get Average CPU & Memory Utilization from SAR Reports + +This bash script collects the CPU & memory averages from each data file and displays them on a page. + +This bash script is slightly different compared to the above script. It shows the average of both (CPU & Memory) in one location, not the other data. + +``` +# vi /opt/scripts/sar-cpu-mem-avg.sh + +#!/bin/bash + +for file in `ls -tr /var/log/sa/sa* | grep -v sar` + +do + + sar -f $file | head -n 1 | awk '{print $4}' + + echo "-----------" + + sar -u -f $file | awk '/Average:/{printf("CPU Average: %.2f%\n"), 100 - $8}' + + sar -r -f $file | awk '/Average:/{printf("Memory Average: %.2f%\n"),(($3-$5-$6)/($2+$3)) * 100 }' + + printf "\n" + +done +``` + +Once you run the script, you will get an output like the one below. + +``` +# sh /opt/scripts/sar-cpu-mem-avg.sh + +08/01/2019 +----------- +CPU Average: 1.90% +Memory Average: 31.09% + +08/02/2019 +----------- +CPU Average: 4.90% +Memory Average: 31.18% + +08/03/2019 +----------- +CPU Average: 4.89% +Memory Average: 31.29% + +08/04/2019 +----------- +CPU Average: 2.82% +Memory Average: 31.24% + +08/05/2019 +----------- +CPU Average: 1.76% +Memory Average: 31.28% +. +. +. +08/29/2019 +----------- +CPU Average: 3.83% +Memory Average: 33.15% + +08/30/2019 +----------- +CPU Average: 5.80% +Memory Average: 33.19% +``` + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/linux-get-average-cpu-memory-utilization-from-sar-data-report/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.2daygeek.com/author/magesh/ +[b]: https://github.com/lujun9972 +[1]: https://www.2daygeek.com/sar-system-performance-monitoring-command-tool-linux/ +[2]: https://www.2daygeek.com/category/shell-script/