How to find the memory consumption of a particular process in linux for every 5 seconds

linux memory process pid

82,020

Solution 1

you may use SNMP to get the memory and cpu usage of a process in a particular device in network :)

Requirements:

the device running the process should have snmp installed and running
snmp should be configured to accept requests from where you will run the script below(it may be configured in snmpd.conf)
you should know the process id(pid) of the process you want to monitor

Notes:

HOST-RESOURCES-MIB::hrSWRunPerfCPU is the number of centi-seconds of the total system's CPU resources consumed by this process. Note that on a multi-processor system, this value may increment by more than one centi-second in one centi-second of real (wall clock) time.
HOST-RESOURCES-MIB::hrSWRunPerfMem is the total amount of real system memory allocated to this process.

Process monitoring script:

echo "IP: "
read ip
echo "specfiy pid: "
read pid
echo "interval in seconds:"
read interval

while [ 1 ]
do
    date
    snmpget -v2c -c public $ip HOST-RESOURCES-MIB::hrSWRunPerfCPU.$pid
    snmpget -v2c -c public $ip HOST-RESOURCES-MIB::hrSWRunPerfMem.$pid
    sleep $interval;
done

Solution 2

Use top -p PID where PID is the process ID. Information about the process should be displayed, including percent of system memory used. Type d and an integer in seconds to change the refresh rate.

Solution 3

use watch to periodically execute your script. here is an example:

watch 'cat /proc/status' --interval=5

watch 'ps aux' --interval=5

Solution 4

This previously posted question:

How to measure actual memory usage of an application or process?

seems like it may thoroughly address your question.

edit: My personal favorite Linux utility for checking the resource usage of processes is top, though it can be misleading for reasons that are explained in the question I linked.

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82,020

Author by

Vamsi

Updated on July 16, 2022

Comments

Vamsi almost 2 years

I just want to know how to find the memory consumption of a particular process for particular time(say 5 seconds)

I am new to linux. So, detailed steps of doing that will be appreciated
Vamsi over 11 years

in the reply that you have given it is found that we can see process and their starting time, cpu usage and all. In addition to that i want to check the process memory usage for 5 seconds
mdunsmuir over 11 years

Do you mean the change in memory usage over that period? My first instinct might be to write a simple script to run a command that outputs a process's memory usage every 5 seconds, and continuously compute the delta.
Vamsi over 11 years

if i want to check for a particular process say pid = 12468 ?
Vamsi over 11 years

Presently i am using this piece to get the CPU usage and the other info of a particular process. unix95= ps -p 12994 -o pid,sz,pcpu,ruser,args,time,stime,pmem,etime I want to check this for every time interval of 5 seconds
0x90 over 11 years

use cat /proc/pid/status or whatever
dward over 11 years

Regardless of the watch interval, ps u -p PID will not refresh it's values as fast as top
Basile Starynkevitch over 11 years

Or use cat /proc/12488/maps if you want a better understanding of the address space of process 12488...
Roselyn Verbo Domingo about 9 years

memory output will be in Kbytes
Bharat Kul Ratan about 8 years

For retrieving PID of an process, one can use ps -aux | grep "process" where "process" is the name of process you are looking for.