getting cpu usage per user

[martien]

Hello everyone. I need a script or the way to make script for getting the cpu usage per system user. I want when I type the script name and the user name (as parameter) to have the current cpu usage. It can be an already done application in whatever language - php,perl,c,bash or just the way to write one. I have few users on my server and they have their own sites and i want to know if they are too hard. Thanks in advance

[burschik]

A simple solution would be

top -b -n 1 -u username | awk 'NR>7 { sum += $9; } END { print sum; }'

[martien]

A simple solution would be

top -b -n 1 -u username | awk 'NR>7 { sum += $9; } END { print sum; }'
That's exactly what i'm looking for. But I have а little lack of understanding - can you explane me this part:
awk 'NR>7 { sum += $9; } END { print sum; }'
10x in advance again.

[burschik]

AWK is what you might call a pattern processing language. It splits its input into records (delimited by newlines by default), compares each record to a number of patterns and takes appropriate actions if it matches. Each record is further split into fields (delimited by white space by default), which are assigned to the variables $1 to $NF (NF is the number of fields).

In our example, we use two patterns, namely "NR>7" and "END". NR is the number of records, a pre-defined variable. BEGIN and END are special patterns that match the beginning and the end of the input. So, what the small AWK program does is this: If the record number is larger than 7, increment the variable sum by the value of field 9 (the percentage of CPU cycles used). After all records have been processed, print out the value of sum.

[martien]

Thank you @burschik. You were very helpful fo me.

[gracie20]

Thanks a lot for the information. It will help me alot.

Gracie Sh
http://hdtvlcdplasma.com

[make-fun]

A bit of a late reply…

Anyway, a more comfortable way would be using Munin and a plugin from MuninExchange called "cpubyuser".

http://munin.projects.linpro.no/
Plugin CpuByUser (http://muninexchange.projects.linpro.no/?search=&cid=27&os[4]=on&os[7]=on&os[3]=on&os[2]=on&os[5]=on&os[8]=on&os[1]=on&os[6]=on&pid=173)

Works like a charm and gives you a much better picture;-)

Cheers