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How to find top memory & CPU consuming process for particular time?

How does cached memory work for executables?How to monitor top applications using CPU (and IO if possible) in a graph?Execution time and resources after processes that has been running for so longHow can I find the amount of memory consumed by a process?detect process eating cpu without: top, htop, ps?Resource (CPU time and memory) limitation and termination of a process upon violation in Linuxsar command vs /proc/stat for cpu usageHow much RAM, Diskspace and CPU time is used by a scriptFind out exact cause of a process' high CPU usage (gnome-shell)How does ps measure %CPU per process (and can this be changed?)

0

I have checked the sar report and found that CPU & Memory is getting utilized much more at particular time (for ex. day ago).

Is it possible to find which process was taking much CPU & Mem?
How do we found which process were consuming that Memory & CPU.

memory cpu sar

share|improve this question

edited yesterday

Prvt_Yadv

2,92531327

asked yesterday

Santosh GaroleSantosh Garole

62

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What interval you are looking for ?
  
  – Vivek Kanadiya
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Suppose we had an incident on 25th of Feb and we got to know on 26th morning?
  
  – Santosh Garole
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, From my understanding there is no was that you will be able to see history as by default it's not logged but you can script is to output in the file to look back! I would say it's better to run it every 2 mins as it will only create text file and then purge it every 5 days.
  
  – Vivek Kanadiya
  15 hours ago
  

  
  
  
  

add a comment | 

0

I have checked the sar report and found that CPU & Memory is getting utilized much more at particular time (for ex. day ago).

Is it possible to find which process was taking much CPU & Mem?
How do we found which process were consuming that Memory & CPU.

memory cpu sar

share|improve this question

edited yesterday

Prvt_Yadv

2,92531327

asked yesterday

Santosh GaroleSantosh Garole

62

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What interval you are looking for ?
  
  – Vivek Kanadiya
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Suppose we had an incident on 25th of Feb and we got to know on 26th morning?
  
  – Santosh Garole
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Well, From my understanding there is no was that you will be able to see history as by default it's not logged but you can script is to output in the file to look back! I would say it's better to run it every 2 mins as it will only create text file and then purge it every 5 days.
  
  – Vivek Kanadiya
  15 hours ago
  

  
  
  
  

add a comment | 

I have checked the sar report and found that CPU & Memory is getting utilized much more at particular time (for ex. day ago).

Is it possible to find which process was taking much CPU & Mem?
How do we found which process were consuming that Memory & CPU.

memory cpu sar

share|improve this question

edited yesterday

Prvt_Yadv

2,92531327

asked yesterday

Santosh GaroleSantosh Garole

62

share|improve this question

edited yesterday

Prvt_Yadv

2,92531327

asked yesterday

Santosh GaroleSantosh Garole

62

share|improve this question

edited yesterday

Prvt_Yadv

2,92531327

asked yesterday

Santosh GaroleSantosh Garole

62

edited yesterday

Prvt_Yadv

2,92531327

edited yesterday

Prvt_Yadv

2,92531327

asked yesterday

Santosh GaroleSantosh Garole

62

asked yesterday

Santosh GaroleSantosh Garole

62

3 Answers
3

active

oldest

votes

1

No.

Unless you have set some (complex) monitoring you won't be able to find out which process used CPU once process has exited.

there is no such "standard" thing as a table with

exec path;exec name;stime,etime,%sys,%io,%wait,%idle,...

you must catch the process during exec time.

share|improve this answer

answered yesterday

ArchemarArchemar

20.4k93973

add a comment | 

0

This can be achieved by saving the output of top command in file:

Script:

NOW=`date "%y%m%d_%H%M%S"` ## to print the time.

echo "$NOW"
top > <PATH_TO_FILE>
exit 0

Once done you can put this script in cron to run at specific internal!!

share|improve this answer

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

New contributor

Vivek Kanadiya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  because top runs repeatedly in the terminal until q is pressed, generally updating every second or every 3 seconds, it will make a heck of a mess redirected into any output file. As well as never quit, so your exit 0 will never happen.
  
  – ron
  yesterday
  
  

  
  
  
  

add a comment | 

0

crontab -e

# min hr day month day_of_week

# every minute run :
1 * * * * /root/watch_processes.sh

one time do manually: mkdir /root/process_watch

create simple script /root/watch_processes.sh

#!/bin/bash

# %cpu pid command args

ps -eo "%C %P %U %c %a" > /root/process_watch/`date +%Y%m%d_%H%M`

The above will create a text file, every minute, having only the date as the filename but they will all be under the given folder which in the example above is /mkdir/process_watch. Adjust accordingly.

http://linuxcommand.org/lc3_man_pages/ps1.html

tweak the output as needed of ps -eo for every process, using %C %P %U %c %a will result in these 5 columns of data

1. cpu %


2. process id


3. user name


4. command running


5. arguments given to command running

In each file you will get a lot of listing with 0.0 in the first column. Someone good with awk or sed can maybe add syntax to the above to filter out the 0% cpu processes.

like was said you have to catch the process when it happens, once the process finishes there is no record of pid# having taken %cpu when. You will have to do a process watch like this then go back and find the offenders.

share|improve this answer

edited yesterday

answered yesterday

ronron

1,1702817

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is this the best Practice to have this kind of steps on Production Machines?
  
  – Santosh Garole
  20 hours ago
  

  
  
  
  

add a comment | 

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1

No.

Unless you have set some (complex) monitoring you won't be able to find out which process used CPU once process has exited.

there is no such "standard" thing as a table with

exec path;exec name;stime,etime,%sys,%io,%wait,%idle,...

you must catch the process during exec time.

share|improve this answer

answered yesterday

ArchemarArchemar

20.4k93973

add a comment | 

1

No.

Unless you have set some (complex) monitoring you won't be able to find out which process used CPU once process has exited.

there is no such "standard" thing as a table with

exec path;exec name;stime,etime,%sys,%io,%wait,%idle,...

you must catch the process during exec time.

share|improve this answer

answered yesterday

ArchemarArchemar

20.4k93973

add a comment | 

No.

Unless you have set some (complex) monitoring you won't be able to find out which process used CPU once process has exited.

there is no such "standard" thing as a table with

exec path;exec name;stime,etime,%sys,%io,%wait,%idle,...

you must catch the process during exec time.

share|improve this answer

answered yesterday

ArchemarArchemar

20.4k93973

exec path;exec name;stime,etime,%sys,%io,%wait,%idle,...

share|improve this answer

answered yesterday

ArchemarArchemar

20.4k93973

answered yesterday

ArchemarArchemar

20.4k93973

answered yesterday

ArchemarArchemar

20.4k93973

0

This can be achieved by saving the output of top command in file:

Script:

NOW=`date "%y%m%d_%H%M%S"` ## to print the time.

echo "$NOW"
top > <PATH_TO_FILE>
exit 0

Once done you can put this script in cron to run at specific internal!!

share|improve this answer

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

New contributor

Vivek Kanadiya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  because top runs repeatedly in the terminal until q is pressed, generally updating every second or every 3 seconds, it will make a heck of a mess redirected into any output file. As well as never quit, so your exit 0 will never happen.
  
  – ron
  yesterday
  
  

  
  
  
  

add a comment | 

0

This can be achieved by saving the output of top command in file:

Script:

NOW=`date "%y%m%d_%H%M%S"` ## to print the time.

echo "$NOW"
top > <PATH_TO_FILE>
exit 0

Once done you can put this script in cron to run at specific internal!!

share|improve this answer

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

New contributor

Vivek Kanadiya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  because top runs repeatedly in the terminal until q is pressed, generally updating every second or every 3 seconds, it will make a heck of a mess redirected into any output file. As well as never quit, so your exit 0 will never happen.
  
  – ron
  yesterday
  
  

  
  
  
  

add a comment | 

This can be achieved by saving the output of top command in file:

Script:

NOW=`date "%y%m%d_%H%M%S"` ## to print the time.

echo "$NOW"
top > <PATH_TO_FILE>
exit 0

Once done you can put this script in cron to run at specific internal!!

share|improve this answer

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

New contributor

Vivek Kanadiya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

NOW=`date "%y%m%d_%H%M%S"` ## to print the time.

echo "$NOW"
top > <PATH_TO_FILE>
exit 0

share|improve this answer

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

New contributor

Vivek Kanadiya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

New contributor

Vivek Kanadiya is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered yesterday

Vivek KanadiyaVivek Kanadiya

3579

0

crontab -e

# min hr day month day_of_week

# every minute run :
1 * * * * /root/watch_processes.sh

one time do manually: mkdir /root/process_watch

create simple script /root/watch_processes.sh

#!/bin/bash

# %cpu pid command args

ps -eo "%C %P %U %c %a" > /root/process_watch/`date +%Y%m%d_%H%M`

The above will create a text file, every minute, having only the date as the filename but they will all be under the given folder which in the example above is /mkdir/process_watch. Adjust accordingly.

http://linuxcommand.org/lc3_man_pages/ps1.html

tweak the output as needed of ps -eo for every process, using %C %P %U %c %a will result in these 5 columns of data

1. cpu %


2. process id


3. user name


4. command running


5. arguments given to command running

In each file you will get a lot of listing with 0.0 in the first column. Someone good with awk or sed can maybe add syntax to the above to filter out the 0% cpu processes.

like was said you have to catch the process when it happens, once the process finishes there is no record of pid# having taken %cpu when. You will have to do a process watch like this then go back and find the offenders.

share|improve this answer

edited yesterday

answered yesterday

ronron

1,1702817

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is this the best Practice to have this kind of steps on Production Machines?
  
  – Santosh Garole
  20 hours ago
  

  
  
  
  

add a comment | 

0

crontab -e

# min hr day month day_of_week

# every minute run :
1 * * * * /root/watch_processes.sh

one time do manually: mkdir /root/process_watch

create simple script /root/watch_processes.sh

#!/bin/bash

# %cpu pid command args

ps -eo "%C %P %U %c %a" > /root/process_watch/`date +%Y%m%d_%H%M`

The above will create a text file, every minute, having only the date as the filename but they will all be under the given folder which in the example above is /mkdir/process_watch. Adjust accordingly.

http://linuxcommand.org/lc3_man_pages/ps1.html

tweak the output as needed of ps -eo for every process, using %C %P %U %c %a will result in these 5 columns of data

1. cpu %


2. process id


3. user name


4. command running


5. arguments given to command running

In each file you will get a lot of listing with 0.0 in the first column. Someone good with awk or sed can maybe add syntax to the above to filter out the 0% cpu processes.

like was said you have to catch the process when it happens, once the process finishes there is no record of pid# having taken %cpu when. You will have to do a process watch like this then go back and find the offenders.

share|improve this answer

edited yesterday

answered yesterday

ronron

1,1702817

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Is this the best Practice to have this kind of steps on Production Machines?
  
  – Santosh Garole
  20 hours ago
  

  
  
  
  

add a comment | 

crontab -e

# min hr day month day_of_week

# every minute run :
1 * * * * /root/watch_processes.sh

one time do manually: mkdir /root/process_watch

create simple script /root/watch_processes.sh

#!/bin/bash

# %cpu pid command args

ps -eo "%C %P %U %c %a" > /root/process_watch/`date +%Y%m%d_%H%M`

The above will create a text file, every minute, having only the date as the filename but they will all be under the given folder which in the example above is /mkdir/process_watch. Adjust accordingly.

http://linuxcommand.org/lc3_man_pages/ps1.html

tweak the output as needed of ps -eo for every process, using %C %P %U %c %a will result in these 5 columns of data

1. cpu %


2. process id


3. user name


4. command running


5. arguments given to command running

In each file you will get a lot of listing with 0.0 in the first column. Someone good with awk or sed can maybe add syntax to the above to filter out the 0% cpu processes.

like was said you have to catch the process when it happens, once the process finishes there is no record of pid# having taken %cpu when. You will have to do a process watch like this then go back and find the offenders.

share|improve this answer

edited yesterday

answered yesterday

ronron

1,1702817

# min hr day month day_of_week

# every minute run :
1 * * * * /root/watch_processes.sh

#!/bin/bash

# %cpu pid command args

ps -eo "%C %P %U %c %a" > /root/process_watch/`date +%Y%m%d_%H%M`

share|improve this answer

edited yesterday

answered yesterday

ronron

1,1702817

answered yesterday

ronron

1,1702817

answered yesterday

ronron

1,1702817