CPU Usage on RH8 false

[scr]

the script cpu.sh contains an error which cuases the shown CPU load to be more than 100%
false: Linux) vmstat -n 1 2 | tail -1 | awk '{print $(NF-3)+$(NF-2)}';;
right: Linux) vmstat -n 1 2 | tail -1 | awk '{print $(NF-1)+$(NF-2)}';;


HTH, Rainer

[KS-Soft]

Are you sure?
Accourding to man pages:

vmstat -n 1 2 | tail -1 | awk '{print $(NF-3)+$(NF-2)}' will retrun user time (NF-3) + system time (NF-2)

vmstat -n 1 2 | tail -1 | awk '{print $(NF-1)+$(NF-2)}' will show idle (NF-1) + system time (NF-2)

Regards
Alex

[scr]

[root@TUX root]# vmstat -V
procps version 2.0.7
[root@TUX root]# vmstat -n
procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id
0 0 0 0 34300 84804 282404 0 0 4 55 35 162 3 1 96

[root@TUX root]# vmstat -n 1 2 | tail -1 | awk '{print $(NF-3)+$(NF-2)}'
831
[root@TUX root]# vmstat -n 1 2 | tail -1 | awk '{print $(NF-1)+$(NF-2)}'
1

In prectice the one I sent you produces reliable and true results.

HTH, Rainer

[KS-Soft]

Oh, I see. procps version 2.0 and version 3.1 have different output formats.
Script must check version and use different awk commands. Or we can have different scripts for differents platforms.
Thank you for information.

Regards
Alex