Monitoring cpu utilisation on linux machines

[Alex_SYB]

Hi

I want to track cpu utilisation for a particular user / process .. Is there an easy way to do this ?

ps is not helping me

[grep4error]

use top maybe

I do it like this

zabbix_agentd.conf:
UserParameter=process.cpu[*],top -b -u $1 -n 1|awk '/$2/ {print $ 9}'

key: process.cpu[<user>,<process>]

not ideal, but works for simple cases. This is not going to work for multiple process instances though...

[Alex_SYB]

didn't think about that.

why a userparm and not a agent run command ?

I think i like your method better !

[sirtech]

Yep I'm doing something similar for this. I used a UserParameter for a couple of reasons. 1 - it minimises the number of SSH connections from the server (think 30 hosts / 60 second intervals; adds up very quickly) and 2 - as a UserParameter the agent can run it in active mode and buffer it when link errors occur.

Note that if you have multiple instances of a similar command running as the same user but with different arguments and need to distinguish between them (e.g. a bunch of rsync's) , you will need to tell top to display the arguments. By default it only shows the command name. This is the -c switch. I.e. updated UserParameter:

UserParameter=process.cpu[*],top -bc -u $1 -n 1|awk '/$2/ {print $9}'

[Alex_SYB]

Yeah i found out about the -c command.

one thing that does do though is change the command from a basename to a fullpathed name ..

minor

I do also like how awk handles the $ 9 (space).. that makes life easier !

I didn't know about the active agent stuff though

Thanks

EDIT - how many of the tasks are actually available as active agent tasks ?

[Alex_SYB]

Hi


add

# key process.cpu[<process>] Look at all users
UserParameter=process.cpu[*],top -b -n 1|awk '/$1/ {print $$9}'
UserParameter=process.cpucmd[*],top -bc -n 1|awk '/$1/ {print $$9}'

give me some flexibility

But when I change the agent type to active... it fails

i can test with zabbix_get and it returns whats seems to be a valid number.

Do i have to do anything more to make it work under active ?

Thanks


EDIT ... seems like it took some time to come back

[Alex_SYB]

Thought I would add to this.

I found some times if the process was not running zabbix would error out as the would be nothing returned by this scripts so and update

# key process.cpu[<process>] Look at all users
UserParameter=process.cpu[*],top -b -n 1|awk 'BEGIN {sum=-1} /$1/ {sum=$$9} END { print sum }'
UserParameter=process.cpucmd[*],top -bc -n 1|awk 'BEGIN {sum=-1} /$1/ {sum=$$9} END { print sum }'

and if you filter by command line... the regex must be of the form [x]. so if your looking for something with a command line like "ThisIsIt" The search string needs to be something like [T]hisIsIt so it doesn't find itself !