How can I measure the actual memory usage of an application or process?

Question

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How do you measure the memory usage of an application or process in Linux?

From the blog articl

Answer 1

Based on answer to a related question.

You may use SNMP to get the memory and CPU usage of a process in a particular device on the 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 file 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