如何使用Bash脚本从SAR报告中获取CPU和内存使用情况

运行脚本后，你将看到如下输出。

# 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
+-------------------------------------------------------------------------------------------------------------------+

脚本 3：从 SAR 报告中获取 CPU 和内存平均利用率的 Bash 脚本

该 bash 脚本从每个数据文件中收集 CPU 和内存平均值并将其显示在一个页面上。

该脚本与上面相比稍微不同。它在同一位置同时显示两者（CPU 和内存）平均值，而不是其他数据。

# 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

运行脚本后，你将看到如下输出。

# 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%

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