I need to write a script capable of identifying when a high cpu utilitzation process.
You could build something around the following command (read the man-page of "ps" for an explanation of the options used:
Basically this lists CPU consumption (pcpu) and virtual memory consumption (vsz) for each process and sorts for CPU consumption.
Quote:
Originally Posted by arizah
but what really is confusing me that even I take the CPU% and then add them all together the number I get is not near close to what I can see in Topas or nmon.
I would like to write shell/perl script which identifies the top unix processes that are performing high disk I/O's or/and writes
If any one knows the solution please help me?
-Swamy (0 Replies)
I am running a Dell PE R815 with 4 x AMD 12 core CPUs with 128GB of RAM and a RAID 5 array of 6 SAS disks. This is an HPC application and is definitely CPU bound, however once I run 16 of these processes (thus pinning 16 cores) the work performed slows down dramatically, to maybe 5 or 10% of what... (2 Replies)
We are using linux server. We have below script running on the crontab and it send the alert if the cpu usage is above 90%.
My question is, the below script tells the CPU usage for one CPU or all CPU in the server?
sar 1 1 | sed '$!d' | awk '{printf("%d", $8)}' > $SAR_LOG
Please let me... (4 Replies)
Hi All,
Yesterday my Linux server went panic and even a small command took a lot of time to run.
When i monitored pl find the below output
Cpu(s): 0.1%us, 98.4%sy, 0.0%ni, 1.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
the time spent on kernel mode is 98 % and also idle time is around 1.5 %...... (4 Replies)
Hi All,
Anyone has script to monitor AIX total processes memory and cpu usage that contribute to the total memory and CPU utilize so far ?
The purpose of this is to analyze process memory trend.
Thanks.
Best Regards,
ckwan (2 Replies)
Dear All,
One production Server is affected by high usage.
Application is slow now. Please guide me how to solve it?
NMON Report shows full cpu usage.
Here im posting some server details.
bash-3.2# lparstat -i
Node Name : *********
Partition Name ... (6 Replies)
I have created one script and i have added it into cron to run after 10 mins. However I have noted that whenever that script runs, It causes CPU utilization of server to increase about 10-20 %
I have rechecked script and there is no way i can make changes, Script contain only 2-3 commands. So... (4 Replies)
HI
In my M5000 , one of domain is having SAp installed. from today onwards we are facing some stange issue.
when we start SAP application, that particular user is taking 95 % of system CP and renaming 5 % is taken by system . because of this reason application is slow.
i have 4 CPU(32... (4 Replies)
hello all,
on linux servers sometimes any of these resources (cpu,memory,disk) get a spike when you are not in front of the server.
the duration of these spikes might be 5 mins or even whole weekend.
my question is there a good way of capturing the events that caused these issues ( cpu or... (5 Replies)
Discussion started by: coolatt
5 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS --debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)