Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Using "ps" command to find high processes
Operating Systems Linux Red Hat Using "ps" command to find high processes Post 302826343 by rbatte1 on Wednesday 26th of June 2013 10:47:46 AM
Old 06-26-2013
You could look at the current C value from a ps command.
Code:
ps -ef | sort -nb -k4

You might need to check the column it is sorting on (I'm assuming the fourth) This should sort the processes based on what is busy that the moment. It's a little hit-and-miss I agree, but it can help. As a process is actually running, the counter gets incremented. When it is idle or swapped out it slowly reduces. This way, the process scheduler can determine which process is next in line so busy processes get (in theory) pushed out a little if the system is busy.

Of course processes will run as fast as they can, so they may get swapped in & out frequently. The trick is to run this a few times and compare the output. A process with a consistently high C value is busy - and you'll probably see the CPU time clocking up too.


How are you measuring your CPU use? If you just use something like:-
Code:
vmstat 1 1

... then the first (and only) line is the average since last boot. If the server has been very busy for a very long time, then that figure can be skewed. Can you post some sample stats and the commands you are getting them with? The tail end of the output from my ps command may help us to. Make sure you sanitise them if need be. We have plenty of users who start Oracle connections specifying the user/password on the command line for everyone to see.



To check the columns and their order, use:-
Code:
ps -ef | head -1

I hope that this helps,

Robin
Liverpool/Blackburn
UK
Last edited by rbatte1; 06-26-2013 at 11:56 AM.. Reason: Added questions
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

"find command" to find the files in the current directories but not in the "subdir"

Dear friends, please tell me how to find the files which are existing in the current directory, but it sholud not search in the sub directories.. it is like this, current directory contains file1, file2, file3, dir1, dir2 and dir1 conatins file4, file5 and dir2 contains file6,... (9 Replies)
Discussion started by: swamymns
9 Replies

2. UNIX for Advanced & Expert Users

command for recently modified files - "find" command not working

I have three files a.txt , b.txt , c.txt in a directory called my_dir1 .These files were created before two or three months . I have a tar file called my_tar1.tar which contains three files a.txt , b.txt , d.txt . Somebody untarred the my_tar1.tar into my_dir1 directory. So existing two files were... (1 Reply)
Discussion started by: joe.mani
1 Replies

3. Shell Programming and Scripting

Identify high values "˙" in a text file using Unix command

I have high values (such as ˙˙˙˙) in a text file contained in an Unix AIX server. I need to identify all the records which are having these high values and also get the position/column number in the record structure if possible. Is there any Unix command by which this can be done to : 1.... (5 Replies)
Discussion started by: devina
5 Replies

4. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

5. Shell Programming and Scripting

Problem with "find" and "grep" command

I want to list all files/lines which except those which contain the pattern ' /proc/' OR ' /sys/' (mind the leading blank). In a first approach I coded: find / -exec ls -ld {} | grep -v ' /proc/| /sys/' \; > /tmp/list.txt But this doesn't work. I got an error (under Ubuntu): grep:... (5 Replies)
Discussion started by: pstein
5 Replies

6. Shell Programming and Scripting

Using sed to find text between a "string " and character ","

Hello everyone Sorry I have to add another sed question. I am searching a log file and need only the first 2 occurances of text which comes after (note the space) "string " and before a ",". I have tried sed -n 's/.*string \(*\),.*/\1/p' filewith some, but limited success. This gives out all... (10 Replies)
Discussion started by: haggismn
10 Replies

7. Shell Programming and Scripting

Find lines with "A" then change "E" to "X" same line

I have a bunch of random character lines like ABCEDFG. I want to find all lines with "A" and then change any "E" to "X" in the same line. ALL lines with "A" will have an "X" somewhere in it. I have tried sed awk and vi editor. I get close, not quite there. I know someone has already solved this... (10 Replies)
Discussion started by: nightwatchrenba
10 Replies

8. Shell Programming and Scripting

What is the use of "finger" command & how to use it to kill the online processes ?

Hi there, I am eager to know what exactly is the use of "finger" command & how to use it to kill the online processes ? :b: (1 Reply)
Discussion started by: abhijitpaul0212
1 Replies

9. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

10. Shell Programming and Scripting

find . -path "*_nobackup*" -prune -iname "*.PDF" \( ! -name "*_nobackup.*" \)

These three finds worked as expected: $ find . -iname "*.PDF" $ find . -iname "*.PDF" \( ! -name "*_nobackup.*" \) $ find . -path "*_nobackup*" -prune -iname "*.PDF" They all returned the match: ./folder/file.pdf :b: This find returned no matches: $ find . -path "*_nobackup*" -prune... (3 Replies)
Discussion started by: wolfv
3 Replies

LEARN ABOUT HPUX

vmstat

vmstat(1)						      General Commands Manual							 vmstat(1)

NAME

       vmstat - report virtual memory statistics

SYNOPSIS

       [interval [count]]

       | |

DESCRIPTION

       The  command  reports certain statistics kept about process, virtual memory, trap, and CPU activity.  It also can clear the accumulators in
       the kernel structure.

   Options
       recognizes the following options:

	      Report disk transfer information as a separate section,
			in the form of transfers per second.

	      Provide an output format
			that is more easily viewed on an 80-column display device.  This format separates the default output into two groups: vir-
			tual  memory  information and CPU data.  Each group is displayed as a separate line of output.	On multiprocessor systems,
			this display format also provides CPU utilization on a per CPU basis for the active processors.

	      Report the number of processes swapped in and out
			and instead of page reclaims and address translation faults and

	      interval	Display successive lines which are summaries over the last interval seconds.  The first line  reported	is  for  the  time
			since  a reboot and each subsequent line is for the last interval only.  If interval is zero, the output is displayed once
			only.  If the option is specified, the column headers are repeated.  If is omitted, the column headers are not repeated.

			The command prints what the system is doing every five seconds.  This is a good choice of printing interval since this	is
			how often some of the statistics are sampled in the system; others vary every second.

	      count	Repeat the summary statistics count times.  If count is omitted or zero, the output is repeated until an interrupt or quit
			signal is received.  From the terminal, these are commonly and respectively (see stty(1)).

	      Report on the number of forks
			and the number of pages of virtual memory involved since boot-up.

	      Print the total number of several kinds of paging-related events
			from the kernel structure that have occurred since boot-up or since was last executed with the option.

	      Clear all accumulators in the kernel
			structure.  This option is restricted to the super user.

       If none of these options is given, displays a one-line summary of the virtual memory activity since boot-up or since the  option  was  last
       executed.

   Column Descriptions
       The column headings and the meaning of each column are:

	      Information about numbers of processes in various states.

			       In run queue

			       Blocked for resources (I/O, paging, etc.)

			       Runnable or short sleeper (< 20 secs) but swapped

	      Information about the usage of virtual and real memory.
			  Virtual pages are considered active if they belong to processes that are running or have run in the last 20 seconds.

			       Active virtual pages

			       Size of the free list

	      Information about page faults and paging activity.
			  These are averaged each five seconds, and given in units per second.

			       Page reclaims (without

			       Address translation faults (without

			       Processes swapped in (with

			       Processes swapped out (with

			       Pages paged in

			       Pages paged out

			       Pages freed per second

			       Anticipated short term memory shortfall

			       Pages scanned by clock algorithm, per second

	      Trap/interrupt rate averages per second over last 5 seconds.

			       Device interrupts per second (nonclock)

			       System calls per second

			       CPU context switch rate (switches/sec)

	      Breakdown of percentage usage of CPU time for the active processors

			       User time for normal and low priority processes

			       System time

			       CPU idle

EXAMPLES

       The following examples show the output for various command options.  For formatting purposes, some leading blanks have been deleted.

       1.     Display the default output.

       2.     Add the disk tranfer information to the default output.

       3.     Display the default output in 80-column format.

       4.     Replace the page reclaims and address translation faults with process swapping in the default output.

       5.     Display the default output twice at five-second intervals.  Note that the headers are repeated.

       6.     Display the default output twice in 80-column format at five-second intervals.  Note that the headers are repeated.

       7.     Display the default output and disk transfers twice in 80-column format at five-second intervals.  Note that the headers repeated.

       8.     Display the number of forks and pages of virtual memory since boot-up.

       9.     Display the counts of paging-related events.

WARNINGS

       Users  of must not rely on the exact field widths and spacing of its output, as these will vary depending on the system, the release of HP-
       UX, and the data to be displayed.

AUTHOR

       was developed by the University of California, Berkeley and HP.

SEE ALSO

       iostat(1).

																	 vmstat(1)
All times are GMT -4. The time now is 04:34 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy